Brandholzite Mineral Data

Brandholzite Mineral Data
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General Brandholzite Information

Help on Chemical Formula: Chemical Formula: Mg[Sb(OH)6]2•6(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Mg2(Sb2)2(OH)12•6(H2O)
Help on Environment: Environment: An alteration of stibnite in the oxidation zone with "antimony-ochers" and stibnite. Mg-dominant analogue of bottinoite
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: 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.
Help on Name Origin: Name Origin: Named after the locality.
Help on Synonym: Synonym: ICSD 89819
  IMA1998-017
 

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Brandholzite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.61207
Help on Cell Dimensions: Cell Dimensions: a = 16.114, c = 9.863, Z = 6; V = 2,217.92 Den(Calc)= 4.62
Help on Crystal System: Crystal System: Trigonal - PyramidalH-M Symbol (3) Space Group: P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 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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Forms: ( 0 1 0) ( 1 0 0) ( 0 0 1)

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Friedrich A , Wildner M , Tillmanns E , Merz P L , American Mineralogist , 85 (2000) p.593-599, Crystal chemistry of the new mineral brandholzite, Mg(H2O)6[Sb(OH)6]2,, and of the synthetic analogues M(H2O)6[Sb(OH)6]2 (Me=Mg,Co)

 

Physical Properties of Brandholzite

Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Brandholzite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.417 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1233,KC= 0.2115
Ncalc = 1.98
Help on Optical Data: Optical Data: Uniaxial (-), e=1.569, w=1.57, bire=0.0010.
 

Calculated Properties of Brandholzite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.42 gm/cc
note: Specific Gravity of Brandholzite =4.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0025947885
Boson Index = 0.9974052115
Help on Photoelectric: Photoelectric: PEBrandholzite = 145.76 barns/electron
U=PEBrandholzite x rElectron Density= 644.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brandholzite is Not Radioactive
 

Brandholzite Classification
Help on Dana Class: 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
Help on Strunz Class: 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 ± (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
Help on References: References: NAME( MinRec, v 32, p 210) PHYS. PROP.(MinRec, v 32, p 210) OPTIC PROP.(MinRec, v 32, p 210)
Help on See Also: 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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Brandholzite

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

 

Notes: