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Mineral - Wikipedia, the free encyclopedia |
 | | The sulfate class also includes the chromate, molybdate, selenate, sulfite, tellurate, and tungstate minerals. |
 | | The halides are the group of minerals forming the natural salts and include fluorite (calcium fluoride), halite (sodium chloride), sylvite (potassium chloride), and sal ammoniac (ammonium chloride). |
 | | This group also includes natural alloys, such as electrum (a natural alloy of gold and silver), phosphides, silicides, nitrides and carbides (which are usually only found naturally in a few rare meteorites). |
| en.wikipedia.org /wiki/Mineral (1637 words) |
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