Mineralogy Database

Veatchite-A Mineral Data

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General Veatchite-A Information

Help on Chemical  Formula: Chemical Formula: Sr2B11O16(OH)5•(H2O)
Help on Composition: Composition: Molecular Weight = 653.19 gm
   Strontium  26.83 %  Sr   31.73 % SrO
   Boron      18.20 %  B    58.62 % B2O3
   Hydrogen    1.08 %  H     9.65 % H2O
   Oxygen     53.89 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr2B11O16(OH)5•(H2O)
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Emet borate depoosit, Kutahya, Turkey. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as a dimorph of veatchite.
Help on Name Pronunciation: Name Pronunciation: Veatchite-A + Pronunciation Say VEATCHITE-A

Veatchite-A Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7747:1:0.5656
Help on Cell Dimensions: Cell Dimensions: a = 20.8, b = 11.72, c = 6.63, Z = 4; alpha = 90°, beta = 90.8°, gamma = 91.95° V = 1,615.14 Den(Calc)= 2.69
Help on Crystal System: Crystal System: Triclinic Space Group: A1,A1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.4(1), 3.32(0.7), 2.59(0.5),

Physical Properties of Veatchite-A

Help on Cleavage: Cleavage: {100} Perfect, {011} Good, {011} Good
Help on Color: Color: Colorless.
Help on Density: Density: 2.73
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Veatchite-A

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2133,KPDmeas= 0.2101,KC= 0.2049
Ncalc = 1.55 - 1.56
Help on Optical Data: Optical Data: Biaxial (+), a=1.549, b=1.551, g=1.621, bire=0.0720, 2V(Calc)=20, 2V(Meas)=25. Dispersion r < v strong.

Calculated Properties of Veatchite-A

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Veatchite-A =2.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEVeatchite-A = 29.71 barns/electron
U=PEVeatchite-A x rElectron Density= 77.98 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Veatchite-A is Not Radioactive

Veatchite-A Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.10)Dana Group Veatchite-A Sr2B11O16(OH)5•(H2O) A1,A1 Tri Veatchite-p! Sr2B11O16(OH)5•(H2O) P 21 2
Help on  Strunz Class: Strunz Class: 06.EC.15 06 - BORATES
  06.E - Pentaborates
  06.EC -Phyllo-pentaborates
06.EC.15 Veatchite Sr2B11O16(OH)5•(H2O) Aa m
06.EC.15 Veatchite-A Sr2B11O16(OH)5•(H2O) A1,A1 Tri
06.EC.15 Veatchite-p! Sr2B11O16(OH)5•(H2O) P 21 2

Other Veatchite-A Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Veatchite-A :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 06.EC.15





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