Hydrotalcite-3R
A structural variant of Hydrotalcite
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Formula:
Mg6Al2(CO3)(OH)16 路 4H2O
Specific Gravity:
2.00 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
Named as a polytype of hydrotalcite by Mills et al. (2012).
A polytype of Hydrotalcite
Hydrotalcite from the type location at Snarum, Norway, is dominated by the 3R polytype (Mills et al., 2016).
Hydrotalcite from the type location at Snarum, Norway, is dominated by the 3R polytype (Mills et al., 2016).
Unique Identifiers
Mindat ID:
52705
Long-form identifier:
mindat:1:1:52705:3
GUID
(UUID V4):
(UUID V4):
0464c502-7489-46b8-88fc-dfb9a9462f17
Physical Properties of Hydrotalcite-3R
Density:
2.00 g/cm3 (Calculated)
Chemical Properties of Hydrotalcite-3R
Formula:
Mg6Al2(CO3)(OH)16 路 4H2O
Crystallography of Hydrotalcite-3R
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3 2/m
Cell Parameters:
a = 6.13 Å, c = 46.15 Å
Ratio:
a:c = 1 : 7.529
Unit Cell V:
1501.84 脜鲁
Z:
3
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.69 脜 | (100) |
| 3.88 脜 | (70) |
| 2.58 脜 | (20) |
| 2.30 脜 | (20) |
| 1.96 脜 | (20) |
| 1.53 脜 | (20) |
| 1.50 脜 | (20) |
Relationship of Hydrotalcite-3R to other Species
Member of:
Other Members of this group:
| Desautelsite | Mg6Mn3+2(OH)16[CO3] 路 4H2O | Trig. 3m (3 2/m) |
| Droninoite | Ni6Fe3+2(OH)16Cl2 路 4H2O | Trig. 3m (3 2/m) : R3m |
| Hydrotalcite | Mg6Al2(CO3)(OH)16 路 4H2O | Trig. 3m (3 2/m) : R3m |
| Iowaite | Mg6Fe3+2(OH)16Cl2 路 4H2O | Trig. 3m (3 2/m) : R3m |
| Kaznakhtite | Ni6Co3+2(CO3)(OH)16 路 4H2O | Trig. 3 : R3 |
| Meixnerite | Mg6Al2(OH)16(OH)2 路 4H2O | Trig. 3m (3 2/m) : R3m |
| Pyroaurite | Mg6Fe3+2(OH)16[CO3] 路 4H2O | Trig. 3m (3 2/m) : R3m |
| Reevesite | Ni6Fe3+2(OH)16(CO3) 路 4H2O | Trig. 3m (3 2/m) : R3m |
| Stichtite | Mg6Cr3+2(OH)16[CO3] 路 4H2O | Trig. 3m (3 2/m) : R3m |
| Takovite | Ni6Al2(OH)16[CO3] 路 4H2O | Trig. 3m (3 2/m) : R3m |
| UM2002-02-COH:FeNi | (Fe2+,Ni)6Fe3+2(CO3)(OH)16 路 4H2O | |
| Woodallite | Mg6Cr2(OH)16Cl2 路 4H2O | Trig. 3m (3 2/m) : R3m |
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 Hydrotalcite-3R
mindat.org URL:
https://www.mindat.org/min-52705.html
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Mineral Dealers:
References for Hydrotalcite-3R
Reference List:
