Parsettensite

parsettensite

tinzenite

sursassite

piemontite

Images

Formula: (K,Na,Ca)_7.5(Mn,Mg)₄₉Si₇₂O₁₆₈(OH)₅₀.nH₂O
Phyllosilicate (sheet silcate), stilpnomelane group, paramorph of zussmanite, manganese-bearing mineral
Specific gravity: 2.59
Hardness: 1½ to 4
Streak: Brownish yellow
Colour: Yellowish brown to honey-yellow, light brown, copper-red
Common impurities: Ti,B,Fe,V,Mg,Ba,Cl,C,P
Environments

Metamorphic environments

Localities

At the Valgraveglia Mine, Reppia, Ne, Genoa, Liguria, Italy, parsettensite is associated with quartz, caryopilite and ganophyllite HOM).

At the type locality, Parsettens Alp, Tinizong, Surses, Albula Region, Grisons, Switzerland, parsettensite occurs in and peripheral to a metamorphosed manganese deposit. Associated minerals include tinzenite, sursassite, piemontite, rhodonite, manganese-bearing calcite, rhodochrosite, quartz, albite and baryte (HOM).

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