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Selenite, satin spar, desert rose, and gypsum flower are crystal habit varieties of the mineral gypsum.. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO 4 ·2H 2 O. Selenite contains no selenium, the similar names both derive from Greek selḗnÄ“ (σελήνη 'Moon').
Crystal healing is a pseudoscientific alternative-medicine practice that uses semiprecious stones and crystals such as quartz, agate, amethyst or opal. Despite the common use of the term "crystal", many popular stones used in crystal healing, such as obsidian, are not technically crystals .
Silver selenide (Ag 2 Se) is the reaction product formed when selenium toning analog silver gelatine photo papers in photographic print toning.The selenium toner contains sodium selenite (Na 2 SeO 3) as one of its active ingredients, which is the source of the selenide (Se 2−) anion combining with the silver in the toning process.
A selenate selenite is a chemical compound or salt that contains selenite and selenate anions (SeO 3 2-and SeO 4 2-). These are mixed anion compounds . Some have third anions.
Selenium is toxic in high concentrations. As sodium selenite, the chronic toxic dose for human beings was described as about 2.4 to 3 milligrams of selenium per day. [7] In 2000, the US Institute of Medicine set the adult Tolerable upper intake levels (UL) for selenium from all sources - food, drinking water and dietary supplements - at 400 μg/day. [8]
Selenite is a fibrous variety of gypsum, [1]: 527 the most common form of satin spars; Gypsum, satin spar [2]: 429 in the form of a lustrous fibrous variety, not, however, defined as selenite; [3]: 217 Calcite or calcite spar is a fibrous variety [2]: 429 superficially resembling selenite, [4]: 169 but much less common in nature;
Selenite (mineral), a variety of gypsum (CaSO 4 ·2H 2 O) Selenites is a synonym of Zophos, a genus of land snails in the family Haplotrematidae; Selenite Range, a mountain range in Pershing County, Nevada Selenite Peak, a summit in the Selenite Range, Nevada; Selenite, a high class citizen that experienced space travel, from the videogame Event_0
Iron(III) selenite is an inorganic compound with the chemical formula Fe 2 (SeO 3) 3. It exists anhydrous form and as various hydrates. It exists anhydrous form and as various hydrates. The heptahydrate is produced by the reaction of ferric chloride and selenous acid (or sodium selenite ) at a pH of 1.05. [ 3 ]
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