Earlandite
A variety of Minerals
What is Earlandite?
Earlandite, [Ca3(C6H5O7)2(H2O)2]·2H2O, is the mineral form of calcium citrate tetrahydrate. It was first reported in 1936 and named after the English microscopist and oceanographer Arthur Earland FRSE. Earlandite occurs as warty fine-grained nodules ca. 1 mm in size in bottom sediments of the Weddell Sea, off Antarctica. Its crystal symmetry was first assigned as orthorhombic, then as monoclinic, and finally as triclinic.
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Earlandite Localities Map
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Quick Facts
Physical Properties
- Color
- White, pale yellow
- Density
- 1.96 g/cm³
Chemical Properties
- Chemical Formula
- Ca3[CH2(COO)-CHOH(COO)-CH2(COO)]2 · 4H2O
- Elements
- C, Ca, H, O
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