Mineral - Ancylit-(Ce)
Ancylit-(Ce)
Chemical Properties
Mineral Class
Carbonates
Toxicity
none
Formula
CeSr(CO₃)₂(OH) · H₂O
Unit Cell
a=5,00 b=8,50 c=7,25 Z=2
Physical Properties
Hardness
4.5
Streak
white
Density
Cleavage
Fracture
splintery
Tenacity
Inelastic-flexible
Optical Properties
Color
brownredgreenpinkcolorless
Birefringence
0,110
Luster
Vitreous,
Greasy
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
dipyramidal, prismatic
Formation
Magmatisch, in Nephelin-Syeniten und Carbonatiten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Ancylit-(Ce), Ancylite
Composition
Elements
Mass
CO₂
23,43
ThO₂
0,52
La₂O₃
13,09
Ce₂O₃
23,41
Pr₂O₃
1,93
Nd₂O₃
5,34
Sm₂O₃
0,30
Gd₂O₃
0,15
FeO
0,20
CaO
1,36
SrO
23,96
BaO
0,60
F
2,16
H₂O
3,24
Russland
Groups and Members
Ancylit-Gruppe
Name and first discovery : Named after the Greek word "ankylos," meaning "bent," due to the round shape of the crystals, particularly from the Greenland type locality. First described in 1901.
Chemistry :
Synonyms :
Varieties :
Abbreviation : Anc-Ce