Veatchite Mineral Data

Veatchite Mineral Data +

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General Veatchite Information

Chemical Formula:

Sr2B11O16(OH)5·(H2O)

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

Empirical Formula:

Sr₂B₁₁O₁₆(OH)₅·(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1938

Locality:

Sterling Borax mine, Tick Canyon, 3. miles NNE of Lang, Los Angeles Co., California. Link to MinDat.org Location Data.

Synonym:

ICSD 16921

PDF 12-712

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Veatchite Crystallography

Axial Ratios:

a:b:c =1.7725:1:0.5653

Cell Dimensions:

a = 20.81, b = 11.74, c = 6.637, Z = 4; beta = 92.2° V = 1,620.29 Den(Calc)= 2.68

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Aa

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.34(1), 10.5(1), 2.61(0.7),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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Clark J R , Christ C L , American Mineralogist , 56 (1971) p.1934-1954, Veatchite: Crystal structure and correlations with p-veatchite

Physical Properties of Veatchite

Cleavage:

[010] Perfect, [001] Indistinct

Color:

Colorless, Pearl white.

Density:

2.62

Diaphaniety:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Veatchite

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

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

Electron Density:

r_electron=2.58 gm/cc
note: r_Veatchite=2.68 gm/cc.

Fermion Index

Fermion Index = 0.05526
Boson Index = 0.94474

Photoelectric:

PE_Veatchite= 29.71 barns/electron
U=PE_Veatchite x r_electron= 76.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Veatchite is Not Radioactive

Veatchite Classification

Dana Class:

26.5.9.1 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.5)Dana Type

(26.5.9)Dana Group

26.5.9.1 Veatchite Sr2B11O16(OH)5·(H2O) Aa m

Strunz Class:

V/K.05-30 V - Nitrates, Carbonates and Borates

V/K - Layered borates with complex groups [Bx(O,OH)y]

V/K.05 - Volkovskite - Veatchite-A series

V/K.05-10 Volkovskite KCa4[B5O8(OH)4][B(OH)3]Cl·4(H2O) P1 1

V/K.05-20 Gowerite CaB6O10·5(H2O) P 2₁/n,P 2₁/a 2/m

V/K.05-30 Veatchite Sr2B11O16(OH)5·(H2O) Aa m

V/K.05-40 Veatchite-p! Sr2B11O16(OH)5·(H2O) P 2₁ 2

V/K.05-50 Veatchite-A Sr2B11O16(OH)5·(H2O) A1,A1 Tri

Other Veatchite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Veatchite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Veatchite Specimen Label here :

Veatchite

Sr2B11O16(OH)5·(H2O)
Dana No: 26.5.9.1 Strunz No: V/K.05-30
Locality:

Notes: