Pollucite

The pollucite is a Minéral of the type Zéolite of Chemical formula (Cs, Na) ₂Al₂Si₄O₁₂·2H₂O. It also frequently contains Fer, Calcium, Rubidium or Potassium. This compound is important as an ore of Césium and sometimes of rubidium. It forms a solid Solution with the Analcime.

This compound was discovered in 1846 on the isle of Elba (Italy) and at summer baptized in reference to the Pollux of the Mythologie owing to the fact that it frequently was met associated with the Pétalite (known previously under the name of castorite).

Pollucite crystallizes in a crystalline Système of the hexoctaedric type (Groupe of space Ia3d) and forms colorless crystals or of color white, gray, and more rarely pink or blue. It is rare to find crystals formed well. Its Dureté is of 6,5 on the scale of hardness Mohs and its Densité of 2,9.

One finds this ore in Pegmatite S rich person in Lithium, associated with quartz, Spodumène, Pétalite, Amblygonite, Lépidolite, Elbaite, Cassitérite, Columbite, Apatite, Eucriptite, Muscovite, Albite or Microcline.

References

Webmineral dated
Mindat with hiring dated
Mineral Dated Publishing - pdf

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