首页 >  Term: eudidymite
eudidymite

A monoclinic mineral, NaBeSi3O7(OH) ; dimorphous with epididymite; vitreous, in transparent to translucent tabular crystals with lamellar twinning having one perfect and one imperfect cleavage; in nepheline-syenite pegmatites with albite, elpidite, and analcime.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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