Satimolite

satimolite

kaliborite

kieserite

boracite

Images

Formula: KNa₂(Al₅Mg₂)[B₁₂O₁₈(OH)₁₂](OH)₆Cl₄.4H₂O
Hydrated unclassified borate
Crystal System: Trigonal
Specific gravity: 1.70 measured, after correction for boracite 31% HOM
Hardness: 1 to 2
Streak: White
Colour: White to colourless
Environments

Salt domes

Localities

At the type locality, the Satimola salt dome, Oral, West Kazakhstan Region, Kazakhstan, satimolite occurs in halite – polyhalite – boracite – kieserite – clay rocks, associated with kaliborite, boracite, kieserite and magnesite. The satimolite is found as dense, rounded aggregates up to 8 mm across that crumble under light pressure into a fine chalk-like powder, consisting of grains 0.001 to 0.003 mm in size, usually irregular in form. Rarely as tabular rhombic forms up to 0.02 mm along the long diagonal (HOM, Mindat).
Satimolite from the Satimola Salt Dome - Image

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