Pyroaurite-3R
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Formula:
Mg6Fe3+2(OH)16(CO3) · 4H2O
Crystal System:
Trigonal
Name:
Named for the structural relationship to pyroaurite. The latter was named in 1865 by Lars Johan Igelstrom from the Greek πυρ -οζ for "fire" and Latin aurum for "gold" in allusion to the golden-yellow color assumed by the mineral on heating at relatively low temperatures. In 2012, the hydrotalcite super-group was redefined by S. J. Mills, A. G. Christy, J. M. R. Genin, T. Kameda, and F. Colombo. Pyroaurite and sjögrenite were defined as pyroaurite-3R and pyroaurite-2H, respectively.
Unique Identifiers
Mindat ID:
46603
Long-form identifier:
mindat:1:1:46603:5
Chemistry of Pyroaurite-3R
Mindat Formula:
Mg6Fe3+2(OH)16(CO3) · 4H2O
Element Weights:
Crystallography of Pyroaurite-3R
Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 3.1094(2) Å, c = 23.4117(9) Å
Ratio:
a:c = 1 : 7.529
Unit Cell V:
196.03 ų (Calculated from Unit Cell)
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Pyroaurite-3R
mindat.org URL:
https://www.mindat.org/min-46603.html
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References for Pyroaurite-3R
Reference List:
Localities for Pyroaurite-3R
Showing 1 localities.
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
USA | |
| Dunn (1995, 2004) |
