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Sulfoborite Mineral Data

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General Sulfoborite Information

Help on Chemical  Formula: Chemical Formula: Mg3B2(SO4)(OH)8(OH,F)2
Help on Composition: Composition: Molecular Weight = 361.67 gm
   Magnesium  20.16 %  Mg   33.43 % MgO
   Boron       5.98 %  B    19.25 % B2O3
   Hydrogen    2.65 %  H    23.66 % H2O
   Sulfur      8.87 %  S    22.14 % SO3
   Oxygen     59.72 %  O
   Fluorine    2.63 %  F     2.63 % F
                -   %   F    -1.11 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3B2(SO4)(OH)8(OH)1.5F0.5
Help on Environment: Environment: Uncommon mineral in marine salt deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1893
Help on Locality: Locality: Westeregeln, Saxony-Anhalt, and at the Wittmar potash mine, Asse, southwest of Braunschweig, Lower Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the sulfur and boron in the composition.
Help on Name Pronunciation: Name Pronunciation: Sulfoborite + Pronunciation Say SULFOBORITE
Help on Synonym: Synonym: ICSD 31195
  PDF 39-1347

Sulfoborite Image

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Comments: Colorless transparent sulfoborite crystal.
Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sulfoborite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8081:1:0.6201
Help on Cell Dimensions: Cell Dimensions: a = 10.132, b = 12.537, c = 7.775, Z = 4; V = 987.62 Den(Calc)= 2.43
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.05(1), 3.09(1), 3.47(1),

Physical Properties of Sulfoborite

Help on Cleavage: Cleavage: {100} Good, {001} Distinct
Help on Color: Color: Colorless.
Help on Density: Density: 2.44
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Sulfoborite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2214,KPDmeas= 0.2205,KC= 0.2291
Ncalc = 1.56
Help on Optical Data: Optical Data: Biaxial (-), a=1.527, b=1.536, g=1.551, bire=0.0240, 2V(Calc)=78, 2V(Meas)=79.6.

Calculated Properties of Sulfoborite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.47 gm/cc
note: Specific Gravity of Sulfoborite =2.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PESulfoborite = 1.13 barns/electron
U=PESulfoborite x rElectron Density= 2.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sulfoborite is Not Radioactive

Sulfoborite Classification

Help on  Dana Class: Dana Class: (27)Compound Borates
  (27.01)Dana Type
  (27.01.05)Dana Group Sulfoborite Mg3B2(SO4)(OH)8(OH,F)2 P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AC.55 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
06.AC.55 Sulfoborite Mg3B2(SO4)(OH)8(OH,F)2 P nma 2/m 2/m 2/m

Other Sulfoborite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Sulfoborite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 06.AC.55





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