Stanfieldite

stanfieldite

whitlockite

troilite

tridymite

Images

Formula: Ca₄Mg₅(PO₄)₆
Anhydrous phosphate
Crystal System: Monoclinic
Specific gravity: 3.15 measured, 3.15 calculated
Hardness: 4 to 5
Colour: Amber to pale red
Solubility: Insoluble in water
Environments

Meteorites

Stanfieldite is a rare component of some stony-iron meteorites. Associated minerals include olivine, whitlockite, farringtonite, troilite, merrillite, orthopyroxenes and tridymite (HOM, Dana).

Localities

The type locality is the Estherville meteorite, Emmet county, Iowa, USA.

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