Whiteite-(CaMnMn)

minerals

jahnsite

zwieselite

nordgauite

Formula: CaMn2+Mn2+2Al2(PO4)4(OH)2.8H2O
Hydrated phosphate containing hydroxyl, jahnsite group, whiteite subgroup
Specific gravity: 2.70
Hardness: 3½
Streak: White
Colour: Colourless to pale yellow
Solubility: Easily soluble in 10% hydrochloric acid at room temperature
Environments

Pegmatites

Localities

At the type locality, the Hagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany, whiteite-(CaMnMn) was found as a secondary mineral on the walls of voids within altered zwieselite crystals or from coronas up to 1 mm in diameter around cubic crystals of uraninite in the core zone of a complex granitic pegmatite that was altered and leached by low-temperature oxidising hydrothermal solutions. Associated minerals include triplite-zwieselite, fluorapatite, nordgauite, columbite-(Fe), a Mn-analogue of montgomeryite, koninckite, jahnsite-(CaMnMn) and uraninite (Mindat, HOM). Whiteite-(CaMnMn) may also be in close association with and as inclusions in kayrobertsonite (AJM 19.1.16).

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