Goldmanite Mineral Data

General Goldmanite Information

Chemical Formula:

Ca3(V,Al,Fe+++)2(SiO4)3

Composition:

Molecular Weight = 484.97 gm

Calcium 24.79 % Ca 34.69 % CaO

Aluminum 3.34 % Al 6.31 % Al₂O₃

Vanadium 12.60 % V 18.54 % V₂O₃

Iron 2.30 % Fe 3.29 % Fe₂O₃

Silicon 17.37 % Si 37.17 % SiO₂

Oxygen 39.59 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃V³⁺_1.2Al_0.6Fe³⁺_0.2(SiO₄)₃

Environment:

Vanadium rich clay found in a metamorphosed uranium-vanadium deposit.

IMA Status:

Approved IMA 1964

Locality:

Unnamed prospect pit in the Sandy or South Laguna Mine, Laguna uranium district, Valencia county, New Mexico. Link to MinDat.org Location Data.

Name Origin:

The name honors Macus I. Goldman, a sedimentary petrologist with the U. S. Geological Survey.

Name Pronunciation:

Goldmanite + Pronunciation

Synonym:

ICSD 27369

PDF 16-714

Goldmanite Image

Images:

Goldmanite

Comments: Dark gray granular goldmanite grains in sandstone.
Location: Sandy Mine, Laguna, Cibola County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Goldmanite Crystallography

Cell Dimensions:

a = 12.011, Z = 8; V = 1,732.76 Den(Calc)= 3.72

Crystal System:

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.688(1), 3.005(0.65), 1.607(0.49),

Forms:

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Forms: ( 2 1 1)

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Crystal Structure:

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Novak G A , Gibbs G V , American Mineralogist , 56 (1971) p.791-823, The crystal chemistry of the silicate garnets, sample Go

Physical Properties of Goldmanite

Cleavage:

None

Color:

Dark green, Brownish green.

Density:

3.74

Diaphaneity:

Transparent to Subopaque

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Goldmanite

Gladstone-Dale:

CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2253,KPDmeas= 0.2241,KC= 0.2253
Ncalc = 1.84

Optical Data:

Isotropic, n=1.821-1.855.

Calculated Properties of Goldmanite

Electron Density:

Bulk Density (Electron Density)=3.66 gm/cc
note: Specific Gravity of Goldmanite =3.72 gm/cc.

Fermion Index:

Fermion Index = 0.0094415187
Boson Index = 0.9905584813

Photoelectric:

PE_Goldmanite= 6.87 barns/electron
U=PE_Goldmanite x rElectron Density= 25.15 barns/cc.

Radioactivity:

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

Goldmanite Classification

Dana Class:

51.04.03b.04 (51)Nesosilicate Insular SiO4 Groups Only

(51.04)with cations in [6] and >[6] coordination

(51.04.03b)Garnet group (Ugrandite series)

51.04.03b.01 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m

51.04.03b.02 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m

51.04.03b.03 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m

51.04.03b.04 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m

51.04.03b.05 Yamatoite? (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m

Strunz Class:

09.AD.25 09 - SILICATES (Germanates)

09.A - Nesosilicates

09.AD -Nesosilicates without additional anions;

09.AD.25 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m

09.AD.25 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 4₁/acd 4/m 2/m 2/m

09.AD.25 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m

09.AD.25 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m

09.AD.25 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m

09.AD.25 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m

09.AD.25 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m

09.AD.25 Wadalite Ca6Al5Si2O16Cl3 I 43d 4 3m

09.AD.25 Holtstamite! Ca3(Al,Mn)2(SiO4)2(OH)4 I 4₁/acd 4/m 2/m 2/m

Other Goldmanite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Goldmanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Print or Cut-and-Paste your Goldmanite Specimen Label here :

Goldmanite

Ca3(V,Al,Fe+++)2(SiO4)3
Dana No: 51.04.03b.04 Strunz No: 09.AD.25
Locality:

Notes: