Mineralogy Database

Hydroxylborite Mineral Data

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General Hydroxylborite Information

Help on Chemical  Formula: Chemical Formula: Mg3(BO3)(OH,F)3
Help on Composition: Composition: Molecular Weight = 185.25 gm
   Magnesium  39.75 %  Mg   65.92 % MgO
   Boron       5.72 %  B    18.41 % B2O3
   Hydrogen    1.09 %  H     9.72 % H2O
   Oxygen     43.18 %  O
   Fluorine   10.26 %  F    10.26 % F
                -   %   F    -4.32 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3.03B0.98(OH)2FO3
Help on Environment: Environment: Occur in the mineralized marble adjacent to the boron ore (suanite-kotoite-ludwigite).. OH-dominant analogue of fluoborite.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Titoskoe deposit, Chersky range, basin of the river Dogdo, Sakha Republic (Yakutia), Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the OH analogue of fluoborite.
Help on Name Pronunciation: Name Pronunciation: Hydroxylborite + Pronunciation Say HYDROXYLBORITE
Help on Synonym: Synonym: IMA2005-054

Hydroxylborite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.34919
Help on Cell Dimensions: Cell Dimensions: a = 8.912, c = 3.112, Z = 2; V = 214.05 Den(Calc)= 2.87
Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.422(1), 4.45(0.82), 2.573(0.65),2.128(0.6), 7.69(0.52), 2.551(0.49), 2.141(0.44), 2.916(0.42),

Physical Properties of Hydroxylborite

Help on Cleavage: Cleavage: {0001} Imperfect
Help on Color: Color: Colorless.
Help on Density: Density: 2.89
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Hydroxylborite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.093 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1911,KPDmeas= 0.1898,KC= 0.2093
Ncalc = 1.6
Help on Optical Data: Optical Data: Uniaxial (-), e=1.531, w=1.566, bire=0.0350.

Calculated Properties of Hydroxylborite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Hydroxylborite =2.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEHydroxylborite = 1.02 barns/electron
U=PEHydroxylborite x rElectron Density= 2.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydroxylborite is Not Radioactive

Hydroxylborite Classification

Help on  Dana Class: Dana Class: (25)Anhydrous Borates Containing Hydroxyl or Halogen
  (25.01)Dana Type
  (25.01.02)Dana Group Fluoborite Mg3(BO3)(F,OH)3 P 63/m 6/m Hydroxylborite! Mg3(BO3)(OH,F)3 P 63/m 6/m
Help on  Strunz Class: Strunz Class: 06.AB.50 06 - BORATES
  06.A - Monoborates
  06.AB -BO3, with additional anions; 1(D) + OH, etc.
06.AB.50 Fluoborite Mg3(BO3)(F,OH)3 P 63/m 6/m
06.AB.50 Hydroxylborite! Mg3(BO3)(OH,F)3 P 63/m 6/m

Other Hydroxylborite Information

Help on References: References: NAME( Geology of Ore Deposits, v49:710) PHYS. PROP.(Geology of Ore Deposits, v49:710) OPTIC PROP.(Geology of Ore Deposits, v49:710)
Help on See Also: See Also: Links to other databases for Hydroxylborite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 06.AB.50





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