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Amoraite
A valid IMA mineral species - pending publication
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Formula:
Ca12Al6(OH)36(CO3)2(SO3) · 15H2O
Crystal System:
Triclinic
Member of:
The first supergroup member with species-defining sulfite group. As mariakrite (another member of the hydrotalcite supergroup) it is distinguished by strongly reduced symmetry.
Unique Identifiers
Mindat ID:
470923
Long-form identifier:
mindat:1:1:470923:3
Similar Names
| Ambrite | A variety of 'Retinite' |
| Ambroite | A synonym of 'Amber' |
IMA Classification of Amoraite
Approved, Pending publication
IMA Formula:
Ca12Al6(OH)36(CO3)2(S4+O3)·15H2O
Classification of Amoraite
5.DA.
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Amor | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Amoraite
Mindat Formula:
Ca12Al6(OH)36(CO3)2(SO3) · 15H2O
Element Weights:
Crystallography of Amoraite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 15.2630(2) Å, b = 16.0664(2) Å, c = 23.0448(3) Å
α = 100.259(1)°, β = 100.936(1)°, γ = 94.299(1)°
α = 100.259(1)°, β = 100.936(1)°, γ = 94.299(1)°
Ratio:
a:b:c = 0.95 : 1 : 1.434
Unit Cell V:
5,425.05 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.89 Å | (100) |
| 3.933 Å | (41) |
| 3.815 Å | (39) |
| 2.882 Å | (29) |
| 2.526 Å | (26) |
| 2.441 Å | (25) |
| 2.323 Å | (19) |
| 2.130 Å | (14) |