ZHARCHIKHITE
AlF(OH)2
Crystal System
Monoclinic
Crystal Class
Prismatic
Space Group
P21/a
Point Group
2/m
Structure & Data
Crystal Structure
Halides are ionically bonded compounds of cations Na1+, Ca2+, etc. & halogen anions F1-, Cl1-, Br1-, I1-; simple halides w/o H2O, M:X = 1:3; structure not known.1 Structure based on octahedral pseudoframework built from zigzag chains of edge-sharing AlF2(OH)4 octahedra; structure type roughly related in α-PbO2 structure type.2
Cell Data
a=5.16Å, b=7.84Å, c=5.18Å, ß=116.2o, Z=4
Geology & Identification
Geologic Occurrence
In cavities in hydrothermally mineralized fault breccia in trachyte in molybdenum-depositZHARCHIKHITEZHARCHIKHITE
Habit
Prismatic macro, elongated, commonly fine-grained and drusy aggregates