Mineralogy Database

Parasibirskite Mineral Data

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General Parasibirskite Information

Help on Chemical  Formula: Chemical Formula: Ca2B2O5•(H2O)
Help on Composition: Composition: Molecular Weight = 199.79 gm
   Calcium   40.12 %  Ca   56.14 % CaO
   Boron     10.82 %  B    34.85 % B2O3
   Hydrogen   1.01 %  H     9.02 % H2O
   Oxygen    48.05 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2B2O5•(H2O)
Help on Environment: Environment: In a vein between gehlenite-spurrite skarns and crystalline limestone. A polymorph of sibirskite.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Fuka, Okayama Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For it's relationship to sibirskite.
Help on Name Pronunciation: Name Pronunciation: Parasibirskite + Pronunciation Say PARASIBIRSKITE
Help on Synonym: Synonym: IMA1996-051

Parasibirskite Image

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Comments: White massive parasibirskite.
Location: Fuka, Bicchu-cho, Kawakami-gun, Okayama-ken, Japan. Scale: Specimen size 1.5 x 2 cm.
© Diederik Visser

Parasibirskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2363:1:0.6538
Help on Cell Dimensions: Cell Dimensions: a = 6.722, b = 5.437, c = 3.555, Z = 1; beta = 93° V = 129.75 Den(Calc)= 2.56
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.237(1), 6.73(0.7), 2.975(0.6),

Physical Properties of Parasibirskite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: White.
Help on Density: Density: 2.5
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Parasibirskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.056 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2359,KPDmeas= 0.2416,KC= 0.2235
Ncalc = 1.56 - 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.556, b=1.593, g=1.663, bire=0.1070

Calculated Properties of Parasibirskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.56 gm/cc
note: Specific Gravity of Parasibirskite =2.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEParasibirskite = 5.05 barns/electron
U=PEParasibirskite x rElectron Density= 12.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parasibirskite is Not Radioactive

Parasibirskite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.07)Dana Type
  (26.07.01)Dana Group Korzhinskite CaB2O4•(H2O) P 2/m 2/m Parasibirskite! Ca2B2O5•(H2O) P 21/m 2/m
Help on  Strunz Class: Strunz Class: 06.BC.20 06 - BORATES
  06.B - Diborates
  06.BC -Ino-diborates with triangles and/or tetrahedra
06.BC.20 Parasibirskite! Ca2B2O5•(H2O) P 21/m 2/m
06.BC.20 Sibirskite CaHBO3 P 21/a 2/m

Other Parasibirskite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Min.Mag.,Vol.62,p521-525,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Parasibirskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 06.BC.20





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