Brandholzite Mineral Data (original) (raw)
General Brandholzite Information
Mg[Sb(OH)6]2•6(H2O)
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
Mg2(Sb2)2(OH)12•6(H2O)
An alteration of stibnite in the oxidation zone with "antimony-ochers" and stibnite. Mg-dominant analogue of bottinoite
Approved IMA 1998 (Dana # Added)
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.
Named after the locality.
ICSD 89819
IMA1998-017
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Brandholzite Crystallography
a:c = 1:0.61207
a = 16.114, c = 9.863, Z = 6; V = 2,217.92 Den(Calc)= 4.62
Trigonal - PyramidalH-M Symbol (3) Space Group: P 3
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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| | 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
Colorless.
Transparent
Vitreous (Glassy)
white
Optical Properties of Brandholzite
CI calc= 0.417 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1233,KC= 0.2115
Ncalc = 1.98
Uniaxial (-), e=1.569, w=1.57, bire=0.0010.
Calculated Properties of Brandholzite
Bulk Density (Electron Density)=4.42 gm/cc
note: Specific Gravity of Brandholzite =4.62 gm/cc.
Fermion Index = 0.0025947885
Boson Index = 0.9974052115
PEBrandholzite = 145.76 barns/electron
U=PEBrandholzite x rElectron Density= 644.87 barns/cc.
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brandholzite is Not Radioactive
Brandholzite Classification
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
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
NAME( MinRec, v 32, p 210) PHYS. PROP.(MinRec, v 32, p 210) OPTIC PROP.(MinRec, v 32, p 210)
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: