Definition of Acuminite

Mineralogy Database
Acuminite

General Information:
 Chemical Formula:
SrAlF4(OH)·(H2O)
 Composition:
(Molecular Weight = 225.62 gm)
Strontium 38.84 % Sr
Aluminum 11.96 % Al
Hydrogen 1.34 % H 
Oxygen 14.18 % O 
Fluorine 33.68 % F 
 Empirical Formula:
SrAlF4(OH)·(H2O)
 IMA Status:
Approved IMA 1985
 Locality:
TL: Greenland, Ivigtut
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
colorless.
 Density:
3.295
 Diaphaniety:
Transparent
 Hardness:
3.5 - Copper Penny
 Luster:
Vitreous (Glassy)
 Streak:
white
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Acuminite definition was found in categories: Science & Technology(1)  Encyclopedia(1)  

Acuminite Definition from Science & Technology Dictionaries & Glossaries

Minerals
Acuminite
SrAlF4(OH) (H2O)


Acuminite Definition from Encyclopedia Dictionaries & Glossaries

Wikipedia English - The Free Encyclopedia
Acuminite
Acuminite (or Acuminit or Acuminita) Sr[AlF4(OH)(H2O)] is a mineral of strontium, aluminium, fluorine, oxygen, and hydrogen. Its name comes from the Latin word acumen, meaning "spear point". Its Mohs scale rating is 3.5.

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