Mineral - Kuzmenkoite-(Mn)
Kuzmenkoite-(Mn)
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
K₂Mn²⁺(Ti,Nb)₄(Si₄O₁₂)₂(OH,O)₄ · 5-6H₂O
Unit Cell
a=14,37 b=13,91 c=7,81 β=117,1° Z=1
Physical Properties
Hardness
5
Streak
white
Density
Normal (2-3,5)
Cleavage
Undeutlich
Fracture
uneven
Tenacity
Brittle
Optical Properties
Color
brownorangeyellow
Birefringence
0,092
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
prismatic
Formation
Eine späte hydrothermale Bildung in winzigen Hohlräumen in albitisierten Nephelin-Syeniten
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Kuzmenkoite-(Mn)
Composition
Elements
Mass
SiO₂
43,61
TiO₂
25,78
Nb₂O₅
4,82
FeO
1,18
MnO
4,06
MgO
0,31
BaO
1,17
Na₂O
0,64
K₂O
7,33
H₂O
10,93
Russland
Groups and Members
Kuzmenkoit-Gruppe