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Hydrougrandite Mineral Data
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General Hydrougrandite Information
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 Chemical Formula: |
(Ca,Mg,Fe++)3(Fe+++,Al)2(SiO4)3-x(OH)4x |
| Composition: |
Molecular Weight = 460.23 gm |
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Calcium 15.68 % Ca 21.93 % CaO |
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Magnesium 4.75 % Mg 7.88 % MgO |
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Aluminum 2.93 % Al 5.54 % Al2O3 |
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Iron 21.84 % Fe 4.68 % FeO / 26.02 % Fe2O3 |
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Silicon 12.21 % Si 26.11 % SiO2 |
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Hydrogen 0.88 % H 7.83 % H2O |
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Oxygen 41.72 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca1.8Mg0.9Fe2+0.3Fe3+1.5Al0.5(SiO4)2(OH)4 |
| IMA Status: |
Discredited IMA 1966 - Valid Species (Pre-IMA) 1954 |
| Locality: |
Hsiao-sungshan, China. Link to MinDat.org Location Data. |
| Name Origin: |
Named as the hydrous analog of ugrandite. |
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Hydrougrandite Crystallography
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| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d |
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Physical Properties of Hydrougrandite
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| Color: |
Green. |
| Density: |
3.45 |
| Diaphaneity: |
Transparent to Translucent |
| Luster: |
Vitreous (Glassy) |
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Optical Properties of Hydrougrandite
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| Optical Data: |
NCalc= 1.85 - from Gladstone-Dale relationship (KC = 0.245) where Ncalc=Dmeas*KC+1 |
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Calculated Properties of Hydrougrandite
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| Electron Density: |
Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Hydrougrandite =3.45 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEHydrougrandite = 9.03 barns/electron
U=PEHydrougrandite x rElectron Density= 30.89 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydrougrandite is Not Radioactive |
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Hydrougrandite Classification
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| Dana Class: |
51.00.00.00 (51)Nesosilicate Minerals |
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(51.00)Without Dana Classification Numbers |
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(51.00.00)Nesosilicate |
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51.00.00.00 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m |
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51.00.00.00 Ursilite* (Mg,Ca)4[(UO2)4(OH)5/(Si2O5)5.5]•13(H2O) Unk Ortho |
| Strunz Class: |
09.AX.00 09 - SILICATES (Germanates) |
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09.A - Unclassified Strunz Nesosilicates |
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09.AX -Nesosilicate |
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09.AX.00 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m |
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09.AX.00 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m |
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Other Hydrougrandite Information
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| References: |
NAME( Acta Geol. Sinica, 44, 219) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Hydrougrandite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Hydrougrandite Specimen Label here :
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Hydrougrandite
(Ca,Mg,Fe++)3(Fe+++,Al)2(SiO4)3-x(OH)4x
Dana No: 51.00.00.00 Strunz No: 09.AX.00
Locality:
Notes:
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