Mineralogy Database

Kurnakovite Mineral Data

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General Kurnakovite Information

Help on Chemical  Formula: Chemical Formula: MgB3O3(OH)5•5(H2O)
Help on Composition: Composition: Molecular Weight = 279.85 gm
   Magnesium   8.69 %  Mg   14.40 % MgO
   Boron      11.59 %  B    37.32 % B2O3
   Hydrogen    5.40 %  H    48.28 % H2O
   Oxygen     74.32 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgB3O3(OH)5•5(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1940
Help on Locality: Locality: Inder, Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Nikolai S. Kurnakov (1860-1941), Russian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Kurnakovite + Pronunciation Say KURNAKOVITE
Help on Synonym: Synonym: ICSD 2153
  PDF 29-856

Kurnakovite Image

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Comments: Very pale lilac-colored crystal of kurnakovite.
Location: Boron, Kramer District, Kern County, California, USA. Scale: 7.2x4x2.5 cm.
© Richard Dale / Dale Minerals

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Comments: Chalky white outer alteration, else gray, translucent, coarsely-crystalline kurnakovite.
Location: The Open Pit, Boron, Kern Co., California, USA. Scale: 5x4x3cm.
© Tom Loomis / Dakota Matrix

Kurnakovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7879:1:0.6071
Help on Cell Dimensions: Cell Dimensions: a = 8.344, b = 10.59, c = 6.43, Z = 2; alpha = 99°, beta = 108.9°, gamma = 105.5° V = 511.61 Den(Calc)= 1.82
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.22(1), 4.9(0.85), 4.21(0.8),

Physical Properties of Kurnakovite

Help on Cleavage: Cleavage: {110} Good, {001} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.83
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Kurnakovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2708,KPDmeas= 0.2752,KC= 0.2732
Ncalc = 1.5 - 1.51
Help on Optical Data: Optical Data: Biaxial (-), a=1.488, b=1.508, g=1.515, bire=0.0270, 2V(Calc)=60, 2V(Meas)=63. Dispersion r > v.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.

Calculated Properties of Kurnakovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.91 gm/cc
note: Specific Gravity of Kurnakovite =1.83 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEKurnakovite = 0.48 barns/electron
U=PEKurnakovite x rElectron Density= 0.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kurnakovite is Not Radioactive

Kurnakovite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.03)Dana Type
  (26.03.03)Dana Group Kurnakovite MgB3O3(OH)5•5(H2O) P1 1
Help on  Strunz Class: Strunz Class: 06.CA.20 06 - BORATES
  06.C - Triborates
  06.CA -Neso-triborates
06.CA.20 Kurnakovite MgB3O3(OH)5•5(H2O) P1 1

Other Kurnakovite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Kurnakovite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 06.CA.20





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