Mineral - Fluckite
Fluckite
Chemical Properties
Mineral Class
Arsenates
Toxicity
middle
Formula
CaMn²⁺(AsO₃OH)₂ · 2H₂O
Unit Cell
a=8,46 b=7,61 c=6,97 α=52° β=98° γ=96° Z=2
Physical Properties
Hardness
3.5 - 4
Streak
white
Density
Normal (2-3,5)
Cleavage
Auf (010) perfekt, auf (100) gut, auf (101) schlecht
Fracture
nd
Tenacity
Optical Properties
Color
redpinkcolorless
Birefringence
0,024
Luster
Vitreous,
Waxy
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Space Group
Habit
leafy, spherical, spear-shaped, radial, tabular
Formation
Oxidationszone von Carbonat-reichen Arsen-Lagerstätten
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Fluckite
Composition
Elements
Mass
As₂O₅
56,60
MnO
17,18
MgO
0,04
CaO
12,98
H₂O
13,20
Frankreich