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Lithiophilite is a mineral containing the element lithium. It is lithium manganese(II) phosphate with formula: LiMnPO4. It occurs in pegmatites often associated with triphylite, the iron end member in a solid solution series. The mineral with intermediate composition is known as sicklerite (Li(Mn,Fe)PO4).
Lithiophylite is a resinous reddish to yellowish brown mineral crystallizing in the orthorhombic system often as slender prisms.
It is usually associated with lepidolite, beryl, quartz, albite, amblygonite, and spodumene of pegmatitic origin. It rather readily weathers to a variety of secondary manganese phosphates and oxides. It is a late-stage mineral in some complex granite pegmatites. Members of the triphylite-lithiophilite series readily alter to secondary minerals.
The type locality is the Branchville Quarry, Branchville, Fairfield County, Connecticut where it was first reported in 1878.
The name lithiophilite is derived from the Greek philos (φιλός) "friend," as lithiophilite is usually found with lithium.
The largest documented single crystal of lithiophilite was found in North Dakota, US, measured 2.44x2.44x1.83 m3 and weighed ~102 tons.
1. ^ Lithiophilite WebMineral
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