Anapaite

anapaite

mitridatite

fairfieldite

vivianite

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Formula:Ca2Fe2+(PO4)2.4H2O
Hydrated phosphate
Crystal System: Triclinic
Specific gravity: 2.81 measured, 2.81 calculated
Hardness: 3½
Streak: White
Colour: Green, greenish-white, milky white, colourless; colourless to light green in transmitted light.
Luminescence: Not fluorescent under UV

Solubility: Readily soluble in hydrochloric and nitric acids
Environments

Pegmatites occasionally
Sedimentary environments

Anapaite occurs in oolitic iron ore, in the stems of fossil trees and in lacustrine sediments (Webmin, HOM). It also occurs occasionally in late-stage phosphate mineralisation in granite pegmatites (Mindat). Associated minerals include fairfieldite, goethite, vivianite and siderite (HOM, Mindat).

At the type locality, Zheleznyi Rog, Anapa, Taman Peninsula, Krasnodar Krai, Russia, anapaite occurs in oolitic iron ore, and in the stems of fossil trees, associated with vivianite, siderite, mitridatite, limonite, goethite and calcite (Mindat).

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