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Quintinite-3R
A structural variant of Quintinite
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Formula:
Mg4Al2(OH)12(CO3) · 3H2O
Crystal System:
Trigonal
A polytype of Quintinite
A polytype of the natural layered double hydroxide (LDH) quintinite.
The crystal structure is based upon double hydroxide layers [M2+,3+(OH)2] with 36 disordered distribution of Mg, Al and Fe and with the
layers stacked according to a 37 rhombohedral type. The stacking sequence of layers can be expressed as ...=АB=BC=CA=. (Zhitova et al. 2017)
Compare meixnerite.
A polytype of the natural layered double hydroxide (LDH) quintinite.
The crystal structure is based upon double hydroxide layers [M2+,3+(OH)2] with 36 disordered distribution of Mg, Al and Fe and with the
layers stacked according to a 37 rhombohedral type. The stacking sequence of layers can be expressed as ...=АB=BC=CA=. (Zhitova et al. 2017)
Compare meixnerite.
Unique Identifiers
Mindat ID:
52788
Long-form identifier:
mindat:1:1:52788:6
Chemistry of Quintinite-3R
Mindat Formula:
Mg4Al2(OH)12(CO3) · 3H2O
Element Weights:
Crystallography of Quintinite-3R
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 3.063(1) Å, c = 22.674(9) Å
Ratio:
a:c = 1 : 7.403
Unit Cell V:
184.2 ų
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 Quintinite-3R
mindat.org URL:
https://www.mindat.org/min-52788.html
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References for Quintinite-3R
Reference List:
Zhitova, Elena S., Krivovichev, Sergey V., Yakovenchuk, Viktor N., Ivanyuk, Gregory Yu., Pakhomovsky, Yakov A., Mikhailova, Julia A. (2018) Crystal chemistry of natural layered double hydroxides: 4. Crystal structures and evolution of structural complexity of quintinite polytypes from the Kovdor alkaline-ultrabasic massif, Kola peninsula, Russia. Mineralogical Magazine, 82 (2). doi:10.1180/minmag.2017.081.046
Localities for Quintinite-3R
Showing 1 localities.
symbol to view information about a locality.
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.
Russia | |
| Yakovenchuk et al. (2018) |
