Veatchite Mineral Data

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)

Environment:

Evaporite borate deposits formed by volcanic activity.

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.

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 1800ï¿½s.

Name Pronunciation:

Veatchite + Pronunciation

Synonym:

ICSD 16921

PDF 12-712

Veatchite Image

Images:

Veatchite

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

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 - Domatic H-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),

Physical Properties of Veatchite

Cleavage:

{010} Perfect, {001} Indistinct

Color:

Colorless, Pearl white.

Density:

2.62

Diaphaneity:

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
Ncalc = 1.54 - 1.55

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:

Bulk Density (Electron Density)=2.58 gm/cc
note: Specific Gravity of Veatchite =2.68 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Veatchite= 29.71 barns/electron
U=PE_Veatchite x rElectron Density= 76.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Veatchite is Not Radioactive

Veatchite Classification

Dana Class:

26.05.09.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.05)Dana Type

(26.05.09)Dana Group

26.05.09.01 Veatchite Sr2B11O16(OH)5•(H2O) Aa m

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

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 - 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
15 - WWW-MINCRYST

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

Veatchite

Sr2B11O16(OH)5•(H2O)
Dana No: 26.05.09.01 Strunz No: 06.EC.15
Locality:

Notes:

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