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出典:Wiktionary
出典:『Wiktionary』 (2010/06/11 04:17 UTC 版)
arctite (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2009/04/23 01:23 UTC 版)
Arctite (Na2Ca4(PO4)3F) is a colourless mineral found in the Kola Peninsula northern Russia. It's Mohs hardness is 5 and has a density of 3.11-3.13. Arctite is transparent with a vitreous lustre. Arctite has a perfect cleavage and a trigonal crystal system.
Arctite