Olshanskyite Mineral Data

General Olshanskyite Information

Chemical Formula:

Ca2[B3O3(OH)6]OH•3(H2O)

Composition:

Molecular Weight = 333.68 gm

Calcium 24.02 % Ca 33.61 % CaO

Boron 9.72 % B 31.30 % B₂O₃

Hydrogen 3.93 % H 35.09 % H₂O

Oxygen 62.33 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂B₃O₃(OH)₇•3(H₂O)

Environment:

Skarn.

IMA Status:

Approved IMA 1969

Locality:

Eastern Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Yakov I. Olshansky (1912-1958), Russian geochemist.

Name Pronunciation:

Olshanskyite + Pronunciation

Olshanskyite Image

Images:

Olshanskyite Henmilite

Comments: Milky white olshanskyite hosting crystals of deep blue henmilite to 6 mm across.
Location: Fuka Mine, Bicchu Town, Kawakama Co., Okayama Pref., Japan. Scale: Crystal size 6 mm.
© John Veevaert

Olshanskyite Crystallography

Axial Ratios:

a:b:c =0.8055:1:0.7456

Cell Dimensions:

a = 7.953, b = 9.873, c = 7.362, Z = 2; alpha = 111°, beta = 94.65°, gamma = 107.53° V = 512.91 Den(Calc)= 2.16

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.81(1), 3.05(0.8), 7.61(0.5),

Physical Properties of Olshanskyite

Color:

Colorless, White, Light brown.

Density:

2.19 - 2.23, Average = 2.21

Diaphaneity:

Transparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Olshanskyite

Gladstone-Dale:

CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2568,KPDmeas= 0.2557,KC= 0.2572
Ncalc = 1.56 - 1.57

Optical Data:

Biaxial (-), a=1.557, b=1.568, g=1.57, bire=0.0130, 2V(Calc)=44, 2V(Meas)=54. Dispersion weak, r > v.

Calculated Properties of Olshanskyite

Electron Density:

Bulk Density (Electron Density)=2.27 gm/cc
note: Specific Gravity of Olshanskyite =2.20 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Olshanskyite= 3.08 barns/electron
U=PE_Olshanskyite x rElectron Density= 6.99 barns/cc.

Radioactivity:

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

Olshanskyite Classification

Dana Class:

25.01.06.01 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.01)Dana Type

(25.01.06)Dana Group

25.01.06.01 Olshanskyite Ca2[B3O3(OH)6]OH•3(H2O) P1 1

Strunz Class:

06.CA.55 06 - BORATES

06.C - Triborates

06.CA -Neso-triborates

06.CA.55 Olshanskyite Ca2[B3O3(OH)6]OH•3(H2O) P1 1

Other Olshanskyite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, AmMin, Vol 86, p1115) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Olshanskyite :
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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Olshanskyite

Ca2[B3O3(OH)6]OH•3(H2O)
Dana No: 25.01.06.01 Strunz No: 06.CA.55
Locality:

Notes:

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