Hydrougrandite Mineral Data

General Hydrougrandite Information

Chemical Formula:

(Ca,Mg,Fe++)3(Fe+++,Al)2(SiO4)3-x(OH)4x

Composition:

Molecular Weight = 460.23 gm

Calcium 15.68 % Ca 21.93 % CaO

Magnesium 4.75 % Mg 7.88 % MgO

Aluminum 2.93 % Al 5.54 % Al₂O₃

Iron 21.84 % Fe 4.68 % FeO / 26.02 % Fe₂O₃

Silicon 12.21 % Si 26.11 % SiO₂

Hydrogen 0.88 % H 7.83 % H₂O

Oxygen 41.72 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca_1.8Mg_0.9Fe²⁺_0.3Fe³⁺_1.5Al_0.5(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

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I a3d

Physical Properties of Hydrougrandite

Color:

Green.

Density:

3.45

Diaphaneity:

Transparent to Translucent

Luster:

Vitreous (Glassy)

Optical Properties of Hydrougrandite

Optical Data:

NCalc= 1.85 - from Gladstone-Dale relationship (KC = 0.245) where Ncalc=Dmeas*KC+1

Calculated Properties of Hydrougrandite

Electron Density:

Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Hydrougrandite =3.45 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Hydrougrandite}= 9.03 barns/electron
U=PE_{Hydrougrandite} x rElectron Density= 30.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydrougrandite is Not Radioactive

Hydrougrandite Classification

Dana Class:

51.00.00.00 (51)Nesosilicate Minerals

(51.00)Without Dana Classification Numbers

(51.00.00)Nesosilicate

51.00.00.00 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m

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)

09.A - Unclassified Strunz Nesosilicates

09.AX -Nesosilicate

09.AX.00 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m

09.AX.00 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m

Other Hydrougrandite Information

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 :

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: