Neha Patil (Editor)

Earlandite

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Category  Organic mineral
Color  White, pale yellow
Strunz classification  10.AC.15
Earlandite
Formula (repeating unit)  [Ca3(C6H5O7)2(H2O)2]·2H2O
Crystal system  Triclinic Unknown space group
Unit cell  a = 5.9466(4), b = 10.2247(8) c = 16.6496(13) [Å]; Z = 2

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 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.

References

Earlandite Wikipedia


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