ZINCOMENITE
Zn(Se4+O3)
Crystal System
Orthorhombic
Crystal Class
Dipyramidal
Space Group
Pbca
Point Group
2/m 2/m 2/m
Structure & Data
Crystal Structure
Contains layers formed by Zn2O8 dimers (consiting of edge-sharing ZnO5 trig b-∆; each dimer shares 4- vertices with neighboring ones) linked via (SeO3)2- grp (with Se4+ in trig ∆ coordination) to form open framework.
Cell Data
a=7.1971Å, b=6.2320Å, c=11.9914Å, Z=8
Geology & Identification
Geologic Occurrence
Volcanic, fumaroleZINCOMENITEZINCOMENITE
Habit
Tabular, equant or prismatic micro crystals, clusters, interrupted incrustations
Twinning
T-shaped
Relationships
RELATIONSHIP TO OTHER MINERALS
Known synthetic analog