Olshanskyite Mineral Data

Olshanskyite Mineral Data +

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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.

Olshanskyite Image

Images:

Click Here for Larger Olshanskyite Image

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 - PinacoidalH-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),

Crystal Structure:

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Callegari A , Mazzi F , Tadini C , The Canadian Mineralogist , 39 (2001) p.137-144, The crystal structure of olshanskyite

Physical Properties of Olshanskyite

Color:

Colorless, White, Light brown.

Density:

2.19 - 2.23, Average = 2.21

Diaphaniety:

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= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2616,KPDmeas= 0.2557,KC= 0.2572

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:

r_electron=2.28 gm/cc
note: r_Olshanskyite=2.21 gm/cc.

Fermion Index

Fermion Index = 0.01996
Boson Index = 0.98004

Photoelectric:

PE_Olshanskyite= 3.08 barns/electron
U=PE_Olshanskyite x r_electron= 7.02 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Olshanskyite is Not Radioactive

Olshanskyite Classification

Dana Class:

25.1.6.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.1)Dana Type

(25.1.6)Dana Group

25.1.6.1 Olshanskyite Ca2[B3O3(OH)6]OH·3(H2O) P1 1

Strunz Class:

V/G.10-10 V - Nitrates, Carbonates and Borates

V/G - "Insel" borates [BO4]5- tetraheders

V/G.10 - Olshanskyite - Carboborite series

V/G.10-10 Olshanskyite Ca2[B3O3(OH)6]OH·3(H2O) P1 1

V/G.10-20 Hexahydroborite Ca[B(OH)4]2·2(H2O) P 2/a 2/m

V/G.10-30 Carboborite Ca2Mg(CO3)2B2(OH)8·4(H2O) P 2₁/n 2/m

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 -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 -École des Mines de Paris

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

Olshanskyite

Ca2[B3O3(OH)6]OH·3(H2O)
Dana No: 25.1.6.1 Strunz No: V/G.10-10
Locality:

Notes: