- KCa4Si8O20(OH,F)·8H2O – white,
colorless Fluorapophyllite-(Na) (formerly
natroapophyllite, apophyllite-(NaF)), NaCa4Si8O20F·8H2O – brown, yellow, colorless...
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compared to the
other two
minerals in the group,
hydroxyapophyllite and
natroapophyllite. It is po****r
among many
mineral collectors because of the large,...
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first letters. Sodium-pharmacosiderite is now natropharmacosiderite,
natroapophyllite is now fluorapophyllite-(Na), for instance. But 2010, hydroxylapatite...