Hexahydroborite Mineral Data

Hexahydroborite Mineral Data
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General Hexahydroborite Information

Help on Chemical Formula: Chemical Formula: Ca[B(OH)4]2•2(H2O)
Help on Composition: Composition: Molecular Weight = 233.79 gm
   Calcium   17.14 %  Ca   23.99 % CaO
   Boron      9.25 %  B    29.78 % B2O3
   Hydrogen   5.17 %  H    46.24 % H2O
   Oxygen    68.44 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaB2(OH)8•2(H2O)
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: Solongo, Transbaikalia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Hexahydroborite + Pronunciation Say HEXAHYDROBORITE
Help on Synonym: Synonym: ICSD 23016
  PDF 30-236
 

Hexahydroborite Image

Click Here for Larger Hexahydroborite Image in a New Browser Window Images:
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Hexahydroborite

Comments: White to translucent hexahydroborite.
Location: Solongo B deposit, Vitim Plateau, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Hexahydroborite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.204:1:1.2049
Help on Cell Dimensions: Cell Dimensions: a = 8.006, b = 6.649, c = 8.012, Z = 2; beta = 104.21° V = 413.44 Den(Calc)= 1.88
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.73(1), 3.118(0.9), 3.37(0.9),
Click Here for Large Hexahydroborite Structure Window Crystal Structure:

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Sedlacek P , Dornberger-Schiff K , Acta Crystallographica, Section B , 27 (1971) p.1532-1541, An OD-Disordered modification of the calcium monoborate dihydrate, Ca[B(OH)4]2*2H2O, Locality: synthetic, Sample: MDO (2)

 

Physical Properties of Hexahydroborite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.87
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Hexahydroborite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2679,KPDmeas= 0.2693,KC= 0.2716
Ncalc = 1.51
Help on Optical Data: Optical Data: Biaxial (+), a=1.498, b=1.503, g=1.51, bire=0.0120, 2V(Calc)=82, 2V(Meas)=83.
 

Calculated Properties of Hexahydroborite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.95 gm/cc
note: Specific Gravity of Hexahydroborite =1.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHexahydroborite = 2.28 barns/electron
U=PEHexahydroborite x rElectron Density= 4.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hexahydroborite is Not Radioactive
 

Hexahydroborite Classification
Help on Dana Class: Dana Class: 26.01.04.01 (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.01)Dana Type
  (26.01.04)Dana Group
 
26.01.04.01 Hexahydroborite Ca[B(OH)4]2•2(H2O) P 2/a 2/m
Help on Strunz Class: Strunz Class: 06.AC.25 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
 
06.AC.25 Hexahydroborite Ca[B(OH)4]2•2(H2O) P 2/a 2/m
 

Other Hexahydroborite Information
Help on References: References: NAME( Dana8) 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 Hexahydroborite :
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
15 - WWW-MINCRYST

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Hexahydroborite

Ca[B(OH)4]2•2(H2O)
Dana No: 26.01.04.01 Strunz No: 06.AC.25
Locality:

 

Notes: