Galena chemical formula

The most common sulfide crystalling in this manner is galena (PbS), the ore mineral of lead. A type of packing that involves two sulfide ions in each of the octahedral positions in the sodium chloride structure is the pyrite structure. This is a high-symmetry structure characteristic of the iron sulfide, pyrite (FeS 2 O).

Galena chemical formula. Galena is a silvery mineral and the most important lead ore. It melts at a low temperature and was first smelted in prehistoric campfires. Thousands of years later, it would be instrumental in creating the first radios and other electronics. Unsurprisingly, it is a stone for transformation and for having an open mind.

Located in northwest Illinois, visitors to Galena enjoy eye-catching architecture and a deep history that could be why the city welcomes about a million of them a year. Galena is rich in local history. Ulysses S. Grant found his way to Gale...

Apr 28, 2022 · Galena is a mixture, not a compound and so it does not have a chemical formula. It is a mixture of sulphides of lead, silver, arsenic, antimony and copper. It is mainly PbS. Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite .Chemical Formula: NaCl : Composition: Molecular Weight = 58.44 gm Sodium 39.34 % Na 53.03 % Na 2 O ... Empirical Formula: NaCl : Environment: Marine or continental evaporite deposits. IMA Status: Valid Species (Pre-IMA) Prehistoric : Locality: World wide in sedimentary basins. Link to MinDat.org Location Data.Chemical Formula: PbS Locality: Joplin district of Missouri, Kansas, and Oklahoma and other world wide occurrences. Name Origin: The Roman naturalist, Pliny, used the name galena to describe lead ore. Galena, also called lead glance, is the natural mineral form of lead(II) sulfide. It is the most important ore of lead and an important source of ...Galena has metallic to lead-gray, cube-shaped crystals that break into cubic, right-angled fragments. It is an ore—a mineral of economic value—that was once mined in southeastern Kansas for its lead content. The Tri-State mining district, which includes the far southeastern corner of the state, was formerly one of the most important lead ...Science; Chemistry; Chemistry questions and answers; What is the maximum mass of pure lead that could be extracted from 85.0 g of galena, a lead ore with the chemical formula PbS? 8 Be sure your answer has a unit symbol, if necessary, and is rounded to 3 significant digits.

Chemical Formula: PbS Locality: Joplin district of Missouri, Kansas, and Oklahoma and other world wide occurrences. Name Origin: The Roman naturalist, Pliny, used the name galena to describe lead ore. Galena, also called lead glance, is the natural mineral form of lead(II) sulfide. It is the most important ore of lead and an important source of ...Sulfide mineral About Galena In Our Earth In Our Society In Our Future In the Upper Midwest Gallery Galena Properties Commonly confused with... Did you know... Galena is the most abundant lead mineral, has been mined for millennia, and remains our major source of that metal.Sphalerite is often found with galena, a lead ore. Sphalerite is a mineral, mixed with zinc and iron sulfide. The chemical formula of Sphalerite is (Zn, Fe)S. The dispersion of sphalerite (0.156) is three times that of diamond, which has a dispersion of 0.44.The word garnet comes from the 14th-century Middle English word gernet, meaning 'dark red'. It is borrowed from Old French grenate from Latin granatus, from granum ('grain, seed'). [3] This is possibly a reference to mela granatum or even pomum granatum (' pomegranate ', [4] Punica granatum ), a plant whose fruits contain abundant and vivid red ...Chemistry Chemical Reactions Chemical Reactions and Equations. 1 Answer Stefan V. Mar 20, 2016 Here's how you can do that. Explanation: You're dealing with a double replacement reaction in which two soluble ionic compounds in aqueous solution react to form an insoluble solid that precipitates out of solution. In this case ...

extract copper via chemical (hydrometallurgical or pyrometallurcial) methods. A list of some valuable minerals is provided in Table 1. Table 1. Some Common Metalliferous Ore Minerals Metal Ore Mineral Chemical Formula Aluminum AlBauxite 2 O 3 3H20 Chromium Chromite FeCr 2 O 4 Cobalt Skutterudite (Co,Ni,Fe)As 3 Copper Chalcopyrite Chalcocite Bornite …Galena's chemical formula is PbS. This expresses that a lead sulfide molecule is composed of one lead (Pb) cation (positive ion) and one sulfur (S) anion. Each ion forms an octahedral structure by ...This formula indicates that a molecule of acetic acid ( Figure 2.21) contains two carbon atoms, four hydrogen atoms, and two oxygen atoms. The ratio of atoms is 2:4:2. Dividing by the lowest common denominator (2) gives the simplest, whole-number ratio of atoms, 1:2:1, so the empirical formula is CH 2 O. Note that a molecular formula is always ...Sep 4, 2023 · Galena, a mineral of both historical plus geological significance, is a lead dissolved mineral with the chemical formula PbS. It racks out with its distinctive metallic luster and cubic crystallization structure, often appearing as shiny, cubic or octahedral crystals. The chemical formula for brown sugar is C12H22O11. Brown sugar and normal table sugar are both sucrose. Both types of sugar have the same chemical formula and relatively the same amount of sucrose.Sulphide. Sulphide, also sometimes called sulfide, is sulphur’s inorganic anion. Sulphide is basically a compound that contains one or more S 2− ions. The chemical formula of sulphide is also S 2−. Many metallic elements, including sulphides, are usually found to occur naturally as minerals. For example, pyrite, which is a sulphide of ...

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Expert Answer. Galena is a major lead ore mineral and has the chemical formula Pbs. What is the percentage of lead in galena? Use the chemical formula to determine the percent composition Write the formula for galena: Pbs Determine the formula weight of galena, Atoms Atomic Weight Total 1 of Pb U 1 x u 1 ofs u 1 x u Formula weight.This mineral has a hardness of 3 and the chemical formula is Cu 5 FeS 4. Chalcopyrite . James St. John/Flickr/CC BY 2.0. Chalcopyrite is a brassy yellow with a multicolored tarnish and a dark-green or black streak. This mineral has a hardness of 3.5 to 4. ... Galena has a hardness of 2.5 and a very heavy weight. Gold Nugget . …3 Eyl 2018 ... Under the experimental conditions employed, dissolution rates were controlled by chemical reactions on the surface of galena. Various research ...Chemical Formula: (PbS) lead Sulfide Mineral Class: Sulfides Mineral Group: Galena Color: lead to silver gray sometimes with a bluish tint Luster: (M) Metallic -Isometric Streak: White* Hardness: 7 Cleavage: Good in 3 directions Fracture: uneven and rarely seen because of the perfect cleavage Common Crystal form or habit: Magnetic: n/a ... Galena is a gray, cubic, shiny, dense mineral most commonly associated with lead. It is one of the earliest minerals used by humans, and one of the most abundant sulfide minerals on the Earth. Relation to Mining. Galena is still mined today in large quantities, not only for lead, but also for silver. Uses

Galena Mineral Facts: Chemical Formula: PbS The Mineral is 86.6% Lead by weight. Colors: Lead -gray on fresh surfaces. Streak: gray. Hardness: 2.5 to 2.75.The total DOS of perfect galena and galena containing Ag, Cu, Bi, and Mn impurities is shown in Fig. 7.21. It can be seen that the total DOS of n-type surfaces (Bi-doped and Mn-doped surface) shifts to negative energy, compared with the p-type surface (Ag-doped, Cu-doped, and perfect surface), indicating that the electronic energy level of the n-type surfaces is lower than that of the p-type ... Galena is also known as lead glance. Its chemical formula is PbS. It is the most abundant Sulphide mineral. so, Galena is an importnt minerl of Pb(Lead) Located in northwest Illinois, visitors to Galena enjoy eye-catching architecture and a deep history that could be why the city welcomes about a million of them a year. Galena is rich in local history. Ulysses S. Grant found his way to Gale...Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite .Mar 30, 2014 · Chemical Formula: PbS Locality: Joplin district of Missouri, Kansas, and Oklahoma and other world wide occurrences. Name Origin: The Roman naturalist, Pliny, used the name galena to describe lead ore. Galena, also called lead glance, is the natural mineral form of lead(II) sulfide. It is the most important ore of lead and an important source of ... Vanadinite is a mineral belonging to the apatite group of phosphates, with the chemical formula Pb 5 (V O 4) 3 Cl.It is one of the main industrial ores of the metal vanadium and a minor source of lead.A dense, brittle mineral, it is usually found in the form of red hexagonal crystals.It is an uncommon mineral, formed by the oxidation of lead ore deposits such as …Galena, PbS – Roasting. The presence of this mineral in any but small quantities is very detrimental, as both lead sulphate and lead silicate (formed by its decomposition in the presence of silica) are very fusible, and, at the temperature required to split up copper sulphate, cause the ore to become pasty and form lumps. ... The …Used in hydraulic fracturing; [Halliburton MSDS] Bauxite is the principal source of aluminum; it is mined in Australia, South America, and the West Indies.Bauxite is refined by the Bayer process to produce alumina (aluminum oxide).Alumina is then reduced to aluminum by the Hall-Heroult process. [Rosenstock, p. 943] The aluminum industry in …Galena crystallizes into isometric crystals with a sodium chloride-like ionic structure. It eventually weathers to secondary minerals of lead or silver. Galena can occasionally be used as an ore for copper, zinc, and antimony. Properties of Galena. Galena is a mineral that contains lead sulfide and has the chemical formula Pbs.Chemical formula: PbS (Pb = lead, S = sulfur) Color: lead gray. Streak: gray-black. Luster: metallic. Hardness: 2.5. Specific gravity: 7.5. Amount of transparency: opaque. …

Crystal Healing, Mineralogy and History. Galena is a silvery mineral and the most important lead ore. It melts at a low temperature and was first smelted in prehistoric campfires. Thousands of years later, it would be instrumental in creating the first radios and other electronics. Unsurprisingly, it is a stone for transformation and for having ...

The Hutchinsonite mineral, with a chemical formula of (Tl,Pb) 2 As 5 S 9, is a deadly cocktail of three highly toxic metals. Namely, it includes lead, arsenic, and thallium alike, each with their own harmful side effects. Deposits of this mineral are rare, and are found in Switzerland, Germany, China, Japan, and Peru.Oct 29, 2009 · Pyrite is iron ore while galena is lead ore. This is the main difference between them. The chemical formula of pyrite is FeS2; it is sulfide compound of iron where as galena is sulfide compound of lead with the chemical formula PbS. The color of galena may vary from light gray to dark gray while pyrite is generally brass yellow in color. Lead(II) sulfate, also known as plumbous sulfate, is a chemical compound. Its chemical formula is PbSO 4. It contains lead and sulfate ions. The lead is in its +2 oxidation state. Properties. Lead(II) sulfate is a white solid. It does not dissolve in water. It is toxic because it has lead in it. It does not dissolve in sulfuric acidGalena is a rocksalt group, sulfide mineral with a chemical formula of PbS. Find facts and data about Galena.Magnetite is a black, opaque, magnetic mineral that leaves a black streak when rubbed across a hard rough surface. It is one of the most abundant metal oxides, and its crystal structure contains both the ferrous (Fe+2) and ferric (Fe+3) forms of iron ions. A complex pattern of electrons between the two forms of iron is the source of its ...Minerals (O-S) » Kirkby Teaching Materials. Galena. Sulfide mineral. About Galena. In Our Earth. In Our Society. In Our Future. In the Upper …Galena is very soft and has perfect cleavage. Care must be taken not to damage the crystals. The mineral will tarnish if exposed to the elements. It is a lead sulfide mineral so please wash hands after handling. This Galena gemstone guide lists qualities of the Galena gem type, including stone colors, common names, meanings, gemstone hardness ...

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Located in northwest Illinois, visitors to Galena enjoy eye-catching architecture and a deep history that could be why the city welcomes about a million of them a year. Galena is rich in local history. Ulysses S. Grant found his way to Gale...Amphibole Crystals . Amphibole is an crucial institution of usually darkish-colored, inosilicate minerals, forming prism or needlelike crystals,composed of double chain SiO4 tetrahedra, connected at the vertices and normally containing ions of iron and/or magnesium in their systems. Amphiboles may be inexperienced, black, colorless, white, …Lead(II) sulfate, also known as plumbous sulfate, is a chemical compound. Its chemical formula is PbSO 4. It contains lead and sulfate ions. The lead is in its +2 oxidation state. Properties. Lead(II) sulfate is a white solid. It does not dissolve in water. It is toxic because it has lead in it. It does not dissolve in sulfuric acidDescription and Identifying Characteristics Its perfect cubic cleavage, metallic luster, lead-gray color, and relative softness readily distinguish galena from most other metallic minerals. Perhaps its most distinctive feature though, is its very high density (high specific gravity). Expert Answer. Galena is a major lead ore mineral and has the chemical formula Pbs. What is the percentage of lead in galena? Use the chemical formula to determine the percent composition Write the formula for galena: Pbs Determine the formula weight of galena, Atoms Atomic Weight Total 1 of Pb U 1 x u 1 ofs u 1 x u Formula weight. galena, also called lead glance, a gray lead sulfide (PbS), the chief ore mineral of lead. CAMEO Chemicals. Lead nitrate is a nitrate of lead produced synthetically by dissolving metallic lead or lead (II) oxide in nitric acid. It is an oxidizing agent and is used to make other lead compounds. It is also used as a heat stabiliser in nylon and polyesters, as a coating for photothermographic paper, and in rodenticides.FeS2 Pyrite has the chemical formula FeS2, meaning it is made up of one iron molecule, Fe, and two sulphur molecules, S. These then combine to form the cubic structure. This …Meaning & Energy. Galena is one of the strongest grounding stones we know of, and we recommend it to anyone who's constantly working towards their goals. Our root chakra …LIMONITE. Chemical Formula: Fe 2 O 3. H 2 O (hydrated iron oxide) Mineral Group: oxides Luster/Color: non-metallic/yellow brown Cleavage: absent Hardness: 5 to 5.5 Other Characteristics: yellow-brown streak, moderate to high sepcific gravity (3.5-4), commonly associated with hematite, massive or fibrous aggregates. ….

Galena definition, a common, heavy mineral, lead sulfide, PbS, occurring in lead-gray crystals, usually cubes, and cleavable masses: the principal ore of lead. See more.A generalized chemical composition for the biotite group is: K(Mg,Fe) 3 (AlSi 3 O 10)(F,OH) 2. ADVERTISEMENT. The name "biotite" is used in the field and in entry-level geology courses because these minerals generally cannot be distinguished without optical, chemical, or x-ray analysis. Biotite is a rock-forming mineral found in a wide range of …Roasting of galena (PbS): The concentrated ore is roasted at a moderate temperature in a reverberatory furnace and in a limited supply of air. The balanced chemical equations are as given below. 2 P b S + 3 O 2 → 2 P b O + 2 S O 2 ↑ P b S + 2 O 2 → P b S O 4 .20 Eyl 2018 ... Galena: PbS Lead sulphide ... What are the chemical names & chemical formula of the following ores: Bauxite,Galena,Cinnabar,Magnetite,Haematite.Galena is the crystalline form of lead sulfide, PbS. It is in the cubic system and often forms beautiful silvery cubic crystals that may display twinning or steps. Galena is the major mineral source of lead. It forms beautiful crystals in the cubic system, many of which are prized by collectors. Galena. Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite .Ex planation: The sulphide minerals are compounds of the metals with sulphur. Some ot the examples are: Galena- ore of lead Formula is PbS. Cinnabar-ore of mercury Formula is HgS. Copper pyrites-ore of copper. formula is CuFeS 2. Hence option A,B,D are correct. Solve any question of General Principles and Processes of Isolation of Elements with:-.galena surface might be elemental sulfur or lead polysulfide.[8] H 3. SURFACTANTS The surface of the solid that is to be floated must have some hydrophobic characteristics; if not, then it must be made to have hydrophobicity treating with some specific chemical reagents. These reagents are known as surface active agents or … Galena chemical formula, Sep 15, 2023 · Galena is a lead gray color. Galena is the natural mineral form of lead sulfide, and an important source of silver. , Quartz,, Tibet. Quartz. Quartz and Hematite Crystals. It is the maximum abundant and widely allotted mineral determined at Earth’s surface. It is abundant all over the arena. In any temperatures. It is abundant in igneous, metamorphic, and sedimentary rocks. It is highly resistant to both mechanical and chemical weathering., Chemical Formula: (Zn,Fe)S ... 100.00 % : Empirical Formula: Zn 0.95 Fe 2+ 0.05 S : Environment: In sulfide ore veins in all rock classes. ... False Galena : ICSD 60378, Structure of galena: Galena has a chemical composition of PbS. That means it contains an equal number of lead and sulfide ions. The ions are …, Baking Soda Research Paper. The chemical name for baking soda is sodium bicarbonate. Its chemical formula is NaHCO3, meaning it's made of one sodium atom, one hydrogen atom, one carbon ... Negative Effects Of Cleaning Products. Think about your family and what you bring bring to your house that might might be dangerous to them and their health., This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: What is the maximum mass of pure lead that could be extracted from 5.0 kg of galena, a lead ore with the chemical formula PbS? Be sure your answer has a unit symbol, if necessary, and is rounded to 2 ... , Difference between Ore and Minerals. Minerals are naturally occurring substances of metals present in the earth’s crust called minerals. For eg - Clay is a mineral of Aluminium. Ores are those minerals that can be used for the extraction of metal easily and profitably. For eg - Bauxite is an ore of Aluminium., Argentite. In mineralogy, argentite (from Latin argentum ' silver') is cubic silver sulfide (Ag 2 S), which can only exist at temperatures above 173 °C (343 °F), [1] 177 °C (351 °F), [2] or 179 °C (354 °F). [3] When it cools to ordinary temperatures it turns into its monoclinic polymorph, acanthite. [2] [3] The International Mineralogical ..., , Chemical Formula: Fe2O3 : Composition: Molecular Weight = 159.69 gm Iron 69.94 % Fe 100.00 % Fe 2 O 3 Oxygen 30.06 % O _____ _____ 100.00 % 100.00 % = TOTAL OXIDE: Empirical Formula: Fe 3+ 2 O 3: …, Roasting of galena (PbS): The concentrated ore is roasted at a moderate temperature in a reverberatory furnace and in a limited supply of air. The balanced chemical equations are as given below. 2 P b S + 3 O 2 → 2 P b O + 2 S O 2 ↑ P b S + 2 O 2 → P b S O 4 ., What is the maximum mass of pure lead that could be extracted from 5.0 kg of galena, a lead ore with the chemical formula PbS? Be sure your answer has a unit symbol, if necessary, and is rounded to 2 significant digits., Chemistry questions and answers. What is the maximum mass of pure lead that could be extracted from 2.0 kg of galena, a lead ore with the chemical formula PbS? Be sure your answer has a unit symbol, if necessary, and is rounded to the carrect number of significant digits.We're toid oxygen is the most coenmon element in the Earth's solid crust., PERCENT TO FORMULA ! We are given the following chemical analysis of a pyroxene. Compute its formula: (Hint: Jadeite NaAlSi 2O 6 – Diopside: CaMgSi 2O 6) Oxide wt. % MolWt oxide Moles oxide Moles cation Mole oxygen Prop cations to O6 SiO 2 56.64 60.086 0.9426 0.9426 1.8852 2 Na 2O 4.38 61.99 0.0707 0.1414 0.707 0.3 Al 2O, 2 Eki 2023 ... The chemical formula of galena is PbS, which means that one molecule of galena is composed of one atom of lead (Pb) and one atom of sulfur (S)., Find molecular formula and molecular weight of galena or Find chemical formula or molecular formula of different substances, calculate its molecular weight ..., Chemical Formula: Fe2O3 : Composition: Molecular Weight = 159.69 gm Iron 69.94 % Fe 100.00 % Fe 2 O 3 Oxygen 30.06 % O _____ _____ 100.00 % 100.00 % = TOTAL OXIDE: Empirical Formula: Fe 3+ 2 O 3: …, Advertisement There are two LP gases that can be stored in liquid form with only moderate pressurization -- propane and butane. Isobutane, which has the same simple chemical formula as butane but has a different chemical structure, is also ..., The Mineral fluorite. Fluorite is a very popular mineral, and it naturally occurs in all colors of the spectrum. It is one of the most varied colored minerals in the mineral kingdom, and the colors may be very intense and almost electric. Pure Fluorite is colorless; the color variations are caused by various impurities., Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite ., 1 Answer. Sorted by: 2. Your equation is the sum of two different and independent equations, namely. 2PbS +3OX2 2PbO +2SOX2 2 P b S + 3 O X 2 2 P b O + 2 S O X 2. PbS +2OX2 PbSOX4 P b S + 2 O X 2 P b S O X 4. And these equations are no use for producing metallic lead. They are not a moderate oxydation, as the ratio …, Lead (II) sulfide. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). ?) Lead (II) sulfide (also spelled sulphide) is an inorganic compound with the formula Pb S. Galena is the principal ore and the most important compound of lead. , Mineral. Crystals of serandite, natrolite, analcime, and aegirine from Mont Saint-Hilaire, Quebec, Canada. In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form. [1] [2] , Galena. Galena is the crystalline form of lead sulfide, PbS. It is in the cubic system and often forms beautiful silvery cubic crystals that may display twinning or steps. Galena is the major mineral source of lead. It forms beautiful crystals in the cubic system, many of which are prized by collectors., Pyrite is iron ore while galena is lead ore. This is the main difference between them. The chemical formula of pyrite is FeS2; it is sulfide compound of iron where as galena is sulfide compound of lead with the chemical formula PbS. The color of galena may vary from light gray to dark gray while pyrite is generally brass yellow in color., Expert Answer. Galena is a major lead ore mineral and has the chemical formula Pbs. What is the percentage of lead in galena? Use the chemical formula to determine the percent composition Write the formula for galena: Pbs Determine the formula weight of galena, Atoms Atomic Weight Total 1 of Pb U 1 x u 1 ofs u 1 x u Formula weight., FeS2 Pyrite has the chemical formula FeS2, meaning it is made up of one iron molecule, Fe, and two sulphur molecules, S. These then combine to form the cubic structure. This …, Researchers have devised a mathematical formula for calculating just how much you'll procrastinate on that Very Important Thing you've been putting off doing. Researchers have devised a mathematical formula for calculating just how much you..., Pyrite is iron ore while galena is lead ore. This is the main difference between them. The chemical formula of pyrite is FeS2; it is sulfide compound of iron where as galena is sulfide compound of lead with the chemical formula PbS. The color of galena may vary from light gray to dark gray while pyrite is generally brass yellow in color., Apr 25, 2017 · The Hutchinsonite mineral, with a chemical formula of (Tl,Pb) 2 As 5 S 9, is a deadly cocktail of three highly toxic metals. Namely, it includes lead, arsenic, and thallium alike, each with their own harmful side effects. Deposits of this mineral are rare, and are found in Switzerland, Germany, China, Japan, and Peru. , The chemical formula for dolomite is {eq}CaMg(CO_3)_2 {/eq}. As previously mentioned, dolomite as a mineral is a carbonate which means it contains an ion composed of carbon bonded to three oxygen ..., Amphibole Crystals . Amphibole is an crucial institution of usually darkish-colored, inosilicate minerals, forming prism or needlelike crystals,composed of double chain SiO4 tetrahedra, connected at the vertices and normally containing ions of iron and/or magnesium in their systems. Amphiboles may be inexperienced, black, colorless, white, …, Group Mineral Name Mineral Formula Native Elements Diamond, Graphite C (No anions) Gold Au Copper ... Mineral Chemical Groups and Formulae for Rock Forming Minerals. Group Mineral ... (OH) 2 Malachite Cu 2 CO 3 (OH) 2 Sulfates Anhydrite CaSO 4 anion = SO 4 Gypsum CaSO 4 •2H 2 O 2-Sulfides Galena PbS anion = S2- Pyrite FeS 2 …