Ancylite-(Ce)

General Information:
 Chemical Formula:
SrCe(CO3)2(OH)·(H2O)
 Composition:
(Molecular Weight = 382.78 gm)
Strontium 22.89 % Sr
Cerium 36.60 % Ce
Hydrogen 0.79 % H 
Carbon 6.28 % C 
Oxygen 33.44 % O 
 Empirical Formula:
SrCe(CO3)2(OH)·(H2O)
 IMA Status:
Approved IMA 1987
 Locality:
Narsarsuk, Greenland.
 Name Origin:
Named for the composition and from the Greek "curved," in allusion to the rounded and distorted character of the crystals.
Physical Properties:
 Cleavage:
None
 Color:
brown, brown red, colorless, gray, or gray pink.
 Density:
3.9
 Diaphaniety:
Transparent to translucent
 Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Pyramidal - Crystals are shaped like pyramids.,
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Vitreous - Greasy
 Streak:
white
More details...