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Polybasite-M2a2b2c

A structural variant of Polybasite
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Formula:
[Ag6Sb2S7][Ag9CuS4]
Crystal System:
Monoclinic
A polytype of Polybasite

Pearceite-Polybasite series


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Unique IdentifiersHide

Mindat ID:
31642
Long-form identifier:
mindat:1:1:31642:0

Chemistry of Polybasite-M2a2b2cHide

Mindat Formula:
[Ag6Sb2S7][Ag9CuS4]
Element Weights:
Element% weight
Ag71.034 %
S15.485 %
Sb10.691 %
Cu2.790 %

Calculated from ideal end-member formula.
Elements listed:
Ag, Cu, S, Sb - search for minerals with similar chemistry

Crystallography of Polybasite-M2a2b2cHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 26.2625(4) Å, b = 15.1623(5) Å, c = 24.1061(6) Å
β = 90.045(5)°
Ratio:
a:b:c = 1.732 : 1 : 1.59
Unit Cell V:
9599 ÅÂģ
Z:
16
Morphology:
Pseudohexagonal tabular, striated crystals.
Comment:
Data for very Ag-rich sample (Bindi & Menchetti, 2009). Evain et al. (2006) give (measured at 100 K) 26.188 (3), 15.1199 (18), 23.784 (3) â„Ŧ, 90° (no s.u. given).

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Polybasite-M2a2b2cHide

References for Polybasite-M2a2b2cHide

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