Braitschite-(Ce)
Braitschite-(Ce) is an IMA-recognized mineral species in the borate class, with the chemical formula Ca₆.₁₅Na₀.₈₅REE₂.₀₈[B₆O₇(OH)₃(O,OH)₃]₄·H₂O.
It crystallizes in the hexagonal crystal system (space group P6/m).
Key properties: specific gravity 2.903; Vitreous luster; optically uniaxial.
IMA symbol Btc-Ce, IMA status: approved, named in 1967.
Found in anhydrite at the contact with sylvite in a thick sequence of marine evaporites, at a depth of about 1 km.
It is found associated with Anhydrite, dolomite, halite, hematite, chalcopyrite.
The mineral was named to honor Dr. Otto Braitsch (1921-1966), University of Freiburg, Freiburg, Germany, for his contributions to evaporate mineralogy and geochemistry.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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