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Formula: SrCaMn3+2Si4O11(OH)4.2H2O
Sorosilicate, ruizite group,
manganese-bearing mineral
Crystal System: Triclinic
Specific gravity: 3.05 measured, 3.09 calculated
Hardness: 5 to 5½
Streak: Light brown
Colour: Brown
Solubility: Insoluble in water or hydrochloric acid
Environments
Metamorphic environments
Hydrothermal environments
Taniaiajacoite is a fairly new mineral, approved in 2015.
Localities
At the type locality, the N'Chwaning III Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape,
South Africa, both Taniaiajacoite and strontioruizite were
found on chemically weathered manganese matrix probably resulting from
hydrothermal activity. Taniaiajacoite occurs as brown radiating groups or aggregates of acicular or prismatic
crystals, with individual crystals up to 0.15 x 0.04 x 0.02 mm. Associated minerals include acicular fibrous purple
sugilite, aegirine, white
pectolite, richterite,
potassic-ferri-leakite,
braunite-II, lipuite,
hematite and microscopic
namansilite
and norrishite
(CM 59.431-444, R&M 95.2.180-181)
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