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Veatchite Mineral Data

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General Veatchite 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 Environment: Environment: Evaporite borate deposits formed by volcanic activity.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1938
Help on Locality: Locality: Sterling Borax mine, Tick Canyon, 3. miles NNE of Lang, Los Angeles Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John A. Veatch (1808-1870), American physician and geologist, who first detected boron in mineral waters in California, USA in the late 1800�s.
Help on Name Pronunciation: Name Pronunciation: Veatchite + Pronunciation Say VEATCHITE
Help on Synonym: Synonym: ICSD 16921
  PDF 12-712

Veatchite Image

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Comments: Shiny colorless platy veatchite crystals on clay matrix.
Location: Tick Canyon, near Lange, Los Angeles Co., California, USA. Scale: Specimen Size 1.5x3.5 cm.
© Diederik Visser

Veatchite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7725:1:0.5653
Help on Cell Dimensions: Cell Dimensions: a = 20.81, b = 11.74, c = 6.637, Z = 4; beta = 92.2° V = 1,620.29 Den(Calc)= 2.68
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Aa
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.34(1), 10.5(1), 2.61(0.7),

Physical Properties of Veatchite

Help on Cleavage: Cleavage: {010} Perfect, {001} Indistinct
Help on Color: Color: Colorless, Pearl white.
Help on Density: Density: 2.62
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Veatchite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.047 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2144,KPDmeas= 0.2193,KC= 0.2049
Ncalc = 1.54 - 1.55
Help on Optical Data: Optical Data: Biaxial (+), a=1.551, b=1.553, g=1.62, bire=0.0690, 2V(Calc)=22, 2V(Meas)=37.

Calculated Properties of Veatchite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.58 gm/cc
note: Specific Gravity of Veatchite =2.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEVeatchite = 29.71 barns/electron
U=PEVeatchite x rElectron Density= 76.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Veatchite is Not Radioactive

Veatchite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.09)Dana Group Veatchite Sr2B11O16(OH)5•(H2O) Aa m
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 Information

Help on References: References: NAME( MinRec) 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 Veatchite :
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

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Dana No: Strunz No: 06.EC.15





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