Veatchite-p Mineral Data

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General Veatchite-p 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:

Approved IMA 1960 (Dana # Added)

Locality:

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

Name Origin:

Named as a dimorph of veatchite.

Name Pronunciation:

Veatchite-p + Pronunciation

Synonym:

P Veatchite

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Images:

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Veatchite-p Crystallography

Axial Ratios:

a:b:c =0.3246:1:0.3178

Cell Dimensions:

a = 6.72, b = 20.7, c = 6.58, Z = 2; beta = 119.67° V = 795.30 Den(Calc)= 2.73

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 2₁

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

By Intensity(I/I_o): 10.4(1), 3.31(0.6), 2.592(0.3),

Physical Properties of Veatchite-p

Color:

Colorless, White.

Density:

2.6 - 2.65, Average = 2.62

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous - Pearly

Optical Properties of Veatchite-p

Gladstone-Dale:

CI meas= -0.068 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2104,KPDmeas= 0.2188,KC= 0.2049
Ncalc = 1.53 - 1.56

Optical Data:

Biaxial (+), a=1.55, b=1.553, g=1.62, bire=0.0700, 2V(Calc)=26, 2V(Meas)=25.

Calculated Properties of Veatchite-p

Electron Density:

Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Veatchite-p =2.73 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Veatchite-p= 29.71 barns/electron
U=PE_Veatchite-p x rElectron Density= 77.98 barns/cc.

Radioactivity:

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

Veatchite-p Classification

Dana Class:

26.05.10.01a (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.05)Dana Type

(26.05.10)Dana Group

26.05.10.01 Veatchite-A Sr2B11O16(OH)5•(H2O) A1,A1 Tri

26.05.10.01a Veatchite-p! Sr2B11O16(OH)5•(H2O) P 2₁ 2

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-p 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-p :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Veatchite-p

Sr2B11O16(OH)5•(H2O)
Dana No: 26.05.10.01a Strunz No: 06.EC.15
Locality:

Notes: