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Hydrotalcite Mineral Data + |
General Hydrotalcite Information |
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| Mg6Al2(CO3)(OH)16·4(H2O) | |||
| Molecular Weight = 603.98 gm | |||
| Magnesium 24.14 % Mg 40.04 % MgO | |||
| Aluminum 8.93 % Al 16.88 % Al2O3 | |||
| Hydrogen 4.01 % H 35.79 % H2O | |||
| Carbon 1.99 % C 7.29 % CO2 | |||
| Oxygen 60.93 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Mg6Al2(CO3)(OH)16·4(H2O) | |||
| Valid Species (Pre-IMA) 1842 | |||
| Link to MinDat.org Location Data. | |||
| ICSD 6296 | |||
| PDF 41-1428 | |||
Hydrotalcite Image | |||
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Hydrotalcite Crystallography |
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| a:c = 1:7.52854 | |||
| a = 6.13, c = 46.15, Z = 3; V = 1,501.84 Den(Calc)= 2.00 | |||
| Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m | |||
| By Intensity(I/Io): 7.69(1), 3.88(0.7), 2.58(0.2), | |||
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Physical Properties of Hydrotalcite |
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| [???] Perfect | |||
| Colorless, White. | |||
| 2.06 | |||
| Transparent | |||
| Flexible - Flexible fragments. | |||
| Foliated - Two dimensional platy forms. | |||
| Lamellar - Thin laminae producing a lamellar structure. | |||
| Massive - Uniformly indistinguishable crystals forming large masses. | |||
| 2 - Gypsum | |||
| Non-fluorescent. | |||
| Pearly | |||
| Nonmagnetic | |||
| white | |||
Optical Properties of Hydrotalcite |
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| CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.024 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2583,KPDmeas= 0.2507,KC= 0.2521 |
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| Uniaxial (-), e=1.495-1.529, w=1.511-1.531, bire=0.0020-0.0160. | |||
Calculated Properties of Hydrotalcite |
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relectron=2.13 gm/cc |
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| Fermion Index = 0.02466 Boson Index = 0.97534 |
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PEHydrotalcite = 0.92 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hydrotalcite is Not Radioactive |
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Hydrotalcite Classification |
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| 16b.6.2.1 (16b)Carbonates - Hydroxyl or Halogen | |||
| (16b.6)Dana Type | |||
| (16b.6.2)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral) | |||
| V/E.03-10 V - Nitrates, Carbonates and Borates | |||
| V/E - Water-bearing carbonates with unfamiliar anions | |||
| V/E.03 - Hydrotalcite group | |||
Other Hydrotalcite Information |
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| PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Hydrotalcite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 - Franklin Minerals(Dunn) 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris Search for Hydrotalcite using: Visit our Advertisers for Hydrotalcite : Translate Hydrotalcite Mineral Data : Ask about Hydrotalcite here : Print or Cut-and-Paste your Hydrotalcite Specimen Label here :
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