首页 >  Term: arfvedsonite
arfvedsonite

A monoclinic mineral, Na3(Fe+2,Mg)4Fe+3Si8O22(OH)2, of the amphibole group; dark green to black; in silica-poor igneous rocks.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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