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Huangite Mineral Data
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General Huangite Information
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 Chemical Formula: |
Ca0.5Al3(SO4)2(OH)6 |
| Composition: |
Molecular Weight = 395.15 gm |
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Calcium 5.07 % Ca 7.10 % CaO |
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Aluminum 20.48 % Al 38.70 % Al2O3 |
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Hydrogen 1.53 % H 13.68 % H2O |
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Sulfur 16.23 % S 40.52 % SO3 |
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Oxygen 56.68 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca0.5Al3(SO4)2(OH)6 |
| Environment: |
Product of acid sulfate hydrothermal alteration of rhyolite tuffs and andesites. |
| IMA Status: |
Approved IMA 1992 |
| Locality: |
El Indio mine, El Indio-Tambo district, east of La Serena, Coquimbo, Chile. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Yunhui Huang (1926- ), Chinese mineralogist, Institute of Mineral Deposit Geology and Mineral Resources, Beijing, China |
| Name Pronunciation: |
Huangite  |
| Synonym: |
IMA1991-009 |
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Huangite Image |
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Images:
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Huangite
Comments: BSE image of alunite (light gray), natroaluminite (dark gray), minamiite (gray slender zone banded by natroaluminite), and huangite (medium gray).
Location: Sulfuric altered andesite, Okumanza, Gunma Prefecture, Japan.
Scale: Picture Size 0.31 x 0.24 mm.
© Mineralogical Journal |
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Huangite Crystallography
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| Axial Ratios: |
a:c = 1:4.79979 |
| Cell Dimensions: |
a = 6.983, c = 33.517, Z = 6; V = 1,415.40 Den(Calc)= 2.78 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.97(1), 4.91(0.75), 2.231(0.51), |
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Physical Properties of Huangite
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| Cleavage: |
{???} Perfect |
| Color: |
White, Yellowish. |
| Diaphaneity: |
Transparent |
| Hardness: |
3-4 - Calcite-Fluorite |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Huangite
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| Optical Data: |
NCalc= 1.59 - from Gladstone-Dale relationship (KC = 0.2132) where Ncalc=Dcalc*KC+1
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Calculated Properties of Huangite
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| Electron Density: |
Bulk Density (Electron Density)=2.80 gm/cc
note: Specific Gravity of Huangite =2.78 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0015600612
Boson Index = 0.9984399388 |
| Photoelectric: |
PEHuangite = 2.23 barns/electron
U=PEHuangite x rElectron Density= 6.24 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Huangite is Not Radioactive |
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Huangite Classification
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| Dana Class: |
30.02.04.08 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen |
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(30.02)where (A B)2 XO4 Zq |
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(30.02.04)Alunite Group (Alunite Subgroup) |
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30.02.04.01 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig |
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30.02.04.02 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m |
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30.02.04.03 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m |
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30.02.04.04 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m |
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30.02.04.05 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m |
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30.02.04.06 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m |
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30.02.04.07 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m |
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30.02.04.08 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m |
| Strunz Class: |
07.BC.10 07 - SULFATES (SELENATES, TELLURATES) |
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07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O |
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07.BC -With medium-sized and large cations |
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07.BC.10 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig |
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07.BC.10 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m |
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07.BC.10 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m |
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07.BC.10 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m |
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07.BC.10 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m |
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07.BC.10 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m |
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07.BC.10 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m |
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07.BC.10 Jarosite KFe3(SO4)2(OH)6 R 3 3 |
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07.BC.10 Hydroniumjarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m |
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07.BC.10 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m |
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07.BC.10 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m |
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07.BC.10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m |
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07.BC.10 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m |
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07.BC.10 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m |
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07.BC.10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m |
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07.BC.10 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m |
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Other Huangite Information
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| References: |
NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.77,p1275-1284,1992) |
| See Also: |
Links to other databases for Huangite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Huangite
Ca0.5Al3(SO4)2(OH)6
Dana No: 30.02.04.08 Strunz No: 07.BC.10
Locality:
Notes:
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