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scapolite |
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scapolite [′skap·ə‚līt] (mineralogy) A white, gray, or pale-green complex aluminosilicate of sodium and calcium belonging to the tectosilicate group of silicate minerals; crystallizes in the tetragonal system and is vitreous; hardness is 5-6 on Mohs scale, and specific gravity is 2.65-2.74. Also known as wernerite. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Last year, scientists reported spectral evidence of a mineral called scapolite, which might have formed on Mars from the heat-processing of carbonate rock by volcanic activity (SN: 11/12/88, p. A combination of well-characterized minerals and synthetic materials were used to calibrate for EPMA, including SMS scapolite (S and Cl), Corning W glass (6) (Co), SMS gahnite (Zn), SMS cassiterite (Sn), SMS strontianite and Corning X glass (Sr). The researchers suggest that one possible source of scapolite on Mars could have been carbon dioxide combined with calcium plagioclase, probably produced by volcanoes in the ancient Martian past. |
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