Formula: Ca4Fe2(PO4)4(OH)2.3H2O
Origin of name: from Greek for yellow and stranger
Crystal system: triclinic
Crystal class: 1 or -1
Twinning:
Unit cell:
Colour: pale yellow to brownish yellow
Diaphaneity:
Luster: dull to waxy
Habit: crystals indistinct lath-like or platy, in masses and crusts, also fibrous, radiating, sheaf-like aggregates
Hardness: about 2.5
Specific gravity: 2.8 to 2.97
Cleavage: 1; perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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