Brandholzite Mineral Data

General Brandholzite Information

Chemical Formula:

Mg[Sb(OH)6]2•6(H2O)

Composition:

Molecular Weight = 1,027.57 gm

Magnesium 2.37 % Mg 3.92 % MgO

Antimony 47.39 % Sb 62.96 % Sb₂O₅

Hydrogen 3.53 % H 31.56 % H₂O

Oxygen 46.71 % O

______ ______

100.00 % 98.44 % = TOTAL OXIDE

Empirical Formula:

Mg2(Sb₂)2(OH)₁₂•6(H₂O)

Environment:

An alteration of stibnite in the oxidation zone with "antimony-ochers" and stibnite. Mg-dominant analogue of bottinoite

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Schmidten-Schacht and Jakobi-Schacht (pits) of the master lode in the former Brandholz-Groldkronach mining district in the western part of the Fichtelgebirge, Bavaria, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

ICSD 89819

IMA1998-017

Brandholzite Crystallography

Axial Ratios:

a:c = 1:0.61207

Cell Dimensions:

a = 16.114, c = 9.863, Z = 6; V = 2,217.92 Den(Calc)= 4.62

Crystal System:

Trigonal - Pyramidal H-M Symbol (3) Space Group: P 3

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

By Intensity(I/I_o): 4.636(1), 3.392(0.7), 4.946(0.5),2.356(0.4), 2.103(0.2), 2.595(0.2), 4.217(0.2),

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Physical Properties of Brandholzite

Color:

Colorless.

Diaphaneity:

Transparent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Brandholzite

Gladstone-Dale:

CI calc= 0.417 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1233,KC= 0.2115
Ncalc = 1.98

Optical Data:

Uniaxial (-), e=1.569, w=1.57, bire=0.0010.

Calculated Properties of Brandholzite

Electron Density:

Bulk Density (Electron Density)=4.42 gm/cc
note: Specific Gravity of Brandholzite =4.62 gm/cc.

Fermion Index:

Fermion Index = 0.0025947885
Boson Index = 0.9974052115

Photoelectric:

PE_Brandholzite= 145.76 barns/electron
U=PE_Brandholzite x rElectron Density= 644.87 barns/cc.

Radioactivity:

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

Brandholzite Classification

Dana Class:

06.03.09.02 (06)Hydroxides and Oxides Containing Hydroxyl

(06.03)with (OH)3 or (OH)6 groups

(06.03.09)Dana Group

06.03.09.01 Bottinoite NiSb2(OH)12•6(H2O) P 3 3

06.03.09.02 Brandholzite! Mg[Sb(OH)6]2•6(H2O) P 3 3

Strunz Class:

04.FH.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FH -Hydroxides with H2O ï¿½ (OH); insular octahedra

04.FH.05 Bottinoite NiSb2(OH)12•6(H2O) P 3 3

04.FH.05 Brandholzite! Mg[Sb(OH)6]2•6(H2O) P 3 3

Other Brandholzite Information

References:

NAME( MinRec, v 32, p 210) PHYS. PROP.(MinRec, v 32, p 210) OPTIC PROP.(MinRec, v 32, p 210)

See Also:

Links to other databases for Brandholzite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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

Brandholzite

Mg[Sb(OH)6]2•6(H2O)
Dana No: 06.03.09.02 Strunz No: 04.FH.05
Locality:

Notes:

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