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Arseniopleite
A valid IMA mineral species - grandfathered
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About Arseniopleite
Formula:
NaCaMnMn2(AsO4)3
Colour:
Brownish-red, also cherry red, gray, yellow, dark green; orange, pale apricot-orange or brownish orange in transmitted light.
Lustre:
Sub-Vitreous, Resinous, Greasy
Hardness:
3½
Specific Gravity:
4.17 - 4.22
Crystal System:
Monoclinic
Member of:
Name:
Named by Lars Johann Igelstrom [February 10, 1822 Yngshyttan, Sweden - May 15, 1897 Gräs, Sunnemo parish, Värmland, Sweden] in 1888 for its arsenic content, and the Greek πλείων ("pleion") for "more", in allusion to the fact that it adds to the number of related minerals already described.
Type Locality:
Unique Identifiers
Mindat ID:
359
Long-form identifier:
mindat:1:1:359:9
IMA Classification of Arseniopleite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
NaCaMn2+Mn2+2(As5+O4)3
First published:
1888
Classification of Arseniopleite
8.AC.10
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
Falotta, Tinizong, Surses, Albula Region, Grisons, Switzerland