Sulfide calcium-magnesium

Figure 7. Photographs of CRT output of electron microprobe depicting heterogeneous particle at the center of two graphite nodules ( ). Particles were identified as calcium-magnesium sulfides a, 1375X b, 5000X c, 1250X d, 5000X-...

Beryllium sulfide, BeS beryllium selenide, BeSe beryllium telluride, BeTe beryllium polonide, BePo magnesium sulfide, MgS magnesium selenide, MgSe magnesium telluride, MgTe calcium sulfide, CaS (oldhamite) calcium selenide, CaSe calcium telluride, CaTe strontium sulfide, SrS strontium selenide, SrSe barium sulfide, BaS barium selenide, BaSe barium hydrosulfide, Ba(HS)2 barium hydrosulfide tetrahydrate, Ba(HS)2 H20. 

Intimate mixtures of chlorates, bromates or iodates of barium, cadmium, calcium, magnesium, potassium, sodium or zinc, with finely divided aluminium, arsenic, copper carbon, phosphorus, sulfur hydrides of alkali- and alkaline earth-metals sulfides of antimony, arsenic, copper or tin metal cyanides, thiocyanates or impure manganese dioxide may react violently or explosively, either spontaneously (especially in presence of moisture) or on initiation by heat, friction, impact, sparks or addition of sulfuric acid [1], Mixtures of sodium or potassium chlorate with sulfur or phosphorus are rated as being exceptionally dangerous on frictional initiation. 

If undistilled sample is used, the addition of zinc sulfate in presence of NaOH would precipitate out iron, magnesium, calcium, and sulfide as a heavy flocculent,... 

Based on the analyses of the trace contaminants conducted on the wheat millfeed-derived products, numerous potential problem components were identified, relative to catalyst activity (3). These components (shown in Table 1) include sulfate (potential for metal sulfide formation) calcium, magnesium, and phosphate (potential for catalyst pore plugging by insoluble salt precipitation) sodium or potassium (alkali attack on the catalyst support) organic nitrogen components, such as amino acids (thiol... 

Procedure Simply place 50 grams (1.8 oz.) of concentrated sulfuric acid into the addition funnel, and then place 30 to 40 grams (1.05 to 1.4 oz.) of powdered sodium sulfide, calcium sulfide, magnesium sulfide, or pulverized pyrites, or pulverized sulfides ores into the reaction flask. Thereafter, slowly drip the concentrated sulfuric acid onto the sulfides. During the sulfuric acid addition, hydrogen sulfide gas will be steadily evolved. 

Dissolution of carbonate minerals has the potential to raise the pH of the pore water to near neutral. Dissolution of carbonate minerals releases calcium, magnesium, manganese, iron, and other cations that are present as solid-solution substitutions or as impurities, and increases the alkalinity of the water. At many sites, the mass of carbonate minerals contained in the mine wastes exceeds that of the sulfide minerals, and... 

Determine the electron arrangement for magnesium sulfide and calcium oxide. 

Content of Sulfur Sulfides Sulfates Phosphates Chlorides Iron Copper Zinc Calcium Magnesium Silica... 

The major components of mineral matter include aluminosilicate clays, silica (quartz), carbonates (usually of calcium, magnesium, or iron), and sulfides (usually as pyrite and/or marcasite). Many other inorganics are present, but only in trace qirantities of the order of parts per tnilhon. 

The formula for calcium sulfide is CaS and that for lithium phosphide is LisP. Predict formulas for (a) magnesium sulfide, (b) potassium phosphide, and (c) magnesium selenide. 

In mineralogy, the technique of separating particles of minerals from water media are of great interest. In only rare cases does one find minerals or metals in pure form (such as gold). The earth surface consists of a variety of minerals (major components are iron-silica-oxides-calcium-magnesium-aluminum-chromium-cobalt-titanium). Minerals as found in nature are always mixed with different kinds (e.g., zinc sulfide and felspar minerals). In order to separate zinc sulfide, one suspends the mixture in water and air bubbles are made to achieve separation. This process is caWeAflotation (ore [heavier than water] is floated by bubbles). 

The alkaline sulfate process uses sodium sulfide and sodium hydroxide as pulping chemicals. The acidic sulfite process is based on calcium, magnesium, and sodium or ammonium bisulfide. Worldwide, the sulfate process is used in up to 90% of cases. 

IQ-, the reaction does not even come close to going to completion. 41.30 L 43a. magnesium sulfide 43b. hydrogen sulfide 43c. calcium hydrogen sulfite 43d. sodium thiosulfate 43e. tetrasulfur tetranitride 45a. FeS (s) + 2 HCl (aq) —> FeClj (aq) +... 

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