Mineral - Yvonite
Yvonite
Chemical Properties
Mineral Class
Arsenates
Toxicity
middle
Formula
Cu(HAsO₄) · 2H₂O
Unit Cell
a=7,63 b=11,17 c=6,02 α=89° β=87° γ=74° Z=4
Physical Properties
Hardness
3.5 - 4
Streak
blue
Density
Normal (2-3,5)
Cleavage
Auf (100) perfekt, auf (010) wenig
Fracture
uneven
Tenacity
Brittle
Optical Properties
Color
blueturquoise
Birefringence
0,085
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Space Group
Habit
leafy, coarse, crusty, spherical, tabular
Formation
Oxidationszone von Arsen-Lagerstätten
Paragenesis
Twinning
Kontaktzwillinge nach (001)
Rarity
Rarely
Synonyms
Yvonite
Composition
Elements
Mass
As₂O₅
47,,80
Al₂O₃
0,40
CuO
33,30
H₂O
19,00
Frankreich
Groups and Members
Krautit-Gruppe