Lüneburgite

luneburgite

colemanite

howlite

searlesite

Images

Formula: Mg₃[B₂(OH)₆(PO₄)₂].6H₂O
Borate
Crystal System: Triclinic
Specific gravity: 2.05 measured, 2.204 calculated
Hardness: 2
Colour: White to brownish or green, colourless
Environments

Evaporite deposits

Lüneburgite is found in clays with evaporite minerals such as halite, sylvite and polyhalite, and has also been found in guano deposits (Mindat).

Localities

At the type Locality, Volgershall, Lüneburg, Lüneburg District, Lower Saxony, Germany, lüneburgite occurs in gypsum-bearing marl, associated with gypsum and boracite (Mindat).

Lüneburgite from Volgershall - Image

At the Rudnik Magnezita Mine, Bela Stena, Baljevac na Ibru, Jarandol Basin, Raška, Raška District, Central Serbia, lüneburgite is associated with colemanite, howlite, searlesite, magnesite and dolomite (HOM).

Lüneburgite from Rudnik - Image

In the Permian Basin, around Carlsbad, Eddy county, New Mexico and into Culbertson county, Texas, USA, lüneburgite is associated with halite, sylvite and polyhalite (HOM).

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