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Formula: NaMn2+5[Si5O14(OH)](VO3)(OH)
Inosilicate (chain silicate), manganese-bearing mineral
Crystal System: Triclinic
Specific gravity: 3.47 measured, 3.51 calculated
Hardness: 6 to 7
Streak: White
Colour: Bright orange, orange-red
Common impurities: Fe,As,Ca,H2O
Environments
Metamorphic environments
Hydrothermal environments
Saneroite occurs in veins in manganese ores associated with
low-grade prehnite-pumpellyite facies
metamorphism
(Webmin).
Localities
At the type locality, the Valgraveglia Mine, Reppia, Ne, Genoa, Liguria, Italy, saneroite occurs in veins in
manganese ores associated with low-grade
prehnite-pumpellyite facies metamorphic
recrystallisation of siliceous-hematitic sediments. Associated minerals
include quartz, baryte,
caryopilite and
ganophyllite
(AM 66.1277-1278, HOM).
At Fianel, Ausserferrera, Ferrera, Viamala Region, Grisons, Switzerland, saneroite is associated with
medaite, palenzonaite,
pyrobelonite, fianelite,
parsettensite,
rhodochrosite,
kutnohorite, aegirine and
quartz
(HOM).
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