Eakerite

eakerite

bavenite

spodumene

tetrawickmanite

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Formula: Ca₂Sn⁴⁺Al₂Si₆O₁₈(OH)₂.2H₂O
Phyllosilicate (sheet silicate), tin-bearing mineral
Crystal System: Monoclinic
Specific gravity: 2.93 measured, 2.931 calculated
Hardness: 5½
Streak: White
Colour: Colourless, white
Solubility: Not soluble in acids or bases
Environments

Pegmatites
Hydrothermal environments

Localities

At the Kitelskoe Sn-Zn deposit, Pitkyarantsky District, Republic of Karelia, Russia, eakerite occurs as exsolved inclusions in tin-bearing andradite (HOM).

At the type locality, the Foote Lithium Co. Mine, Kings Mountain Mining District, Cleveland county, North Carolina, USA, eakerite occurs as transparent prismatic crystals in a seam in a spodumene-rich pegmatite. It is probably of hydrothermal origin. Associated minerals include tetrawickmanite, bavenite, quartz and albite. The eakerite crystals are implanted on quartz and albite, commonly intergrown with bavenite and some specimens are coated by crystals of pink apatite (Minrec 1.92-96, HOM, Mindat).

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