Hydrougrandite Mineral Data

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 1967

Locality:

Link to MinDat.org Location Data.

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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

Diaphaniety:

Transparent to Translucent

Luster:

Vitreous (Glassy)

Optical Properties of Hydrougrandite

Optical Data:

NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.2362) where Ncalc=Dmeas*KC+1

Calculated Properties of Hydrougrandite

Electron Density:

r_electron=3.42 gm/cc
note: r_{Hydrougrandite}=3.45 gm/cc.

Fermion Index

Fermion Index = 0.01549
Boson Index = 0.98451

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hydrougrandite is Not Radioactive

Hydrougrandite Classification

Dana Class:

51.0.0.0 (51)Nesosilicate Minerals

(51.0)Without Dana Classification Numbers

(Nesosilicate)

Strunz Class:

VIII/A.08-100 VIII - Silicates

VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6]

VIII/A.08 - Garnet group, Pyrope - Henritermierite

VIII/A.08-10 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-20 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-30 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-40 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-50 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-60 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-70 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-80 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m

VIII/A.08-90 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m

VIII/A.08-100 Hydrougrandite (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m

VIII/A.08-110 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-120 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m

VIII/A.08-125 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m

VIII/A.08-130 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-138 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-140 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-150 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m

VIII/A.08-160 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 4₁/acd 4/m 2/m 2/m

Other Hydrougrandite Information

References:

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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Hydrougrandite

(Ca,Mg,Fe++)3(Fe+++,Al)2(SiO4)3-x(OH)4x
Dana No: Unknown Strunz No: VIII/A.08-100
Locality:

Notes: