Volkovskite Mineral Data (original) (raw)

General Volkovskite Information

Help on Chemical Formula: Chemical Formula:

KCa4[B5O8(OH)4][B(OH)3]Cl•4(H2O)

Help on Composition: Composition:

Molecular Weight = 618.83 gm

Potassium 6.32 % K 7.61 % K2O

Calcium 25.91 % Ca 36.25 % CaO

Boron 10.48 % B 33.75 % B2O3

Hydrogen 2.44 % H 21.83 % H2O

Chlorine 5.73 % Cl 5.73 % Cl

- % Cl -1.29 % -O=Cl2

Oxygen 49.12 % O

______ ______

100.00 % 103.88 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

KCa4B6O8(OH)7Cl•4(H2O)

Help on Environment: Environment:

Found in water-insoluble residues from salt domes and potash deposits.

Help on IMA Status: IMA Status:

Approved IMA 1966

Help on Locality: Locality:

Inder borate deposit, Kazakhstan. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for A.I. Volkovskaya, petrographer, who first noted the mineral.

Help on Synonym: Synonym:

ICSD 39637

PDF 18-1460

Volkovskite Image

Click Here for Larger Volkovskite Image in a New Browser Window Images:

Volkovskite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.2748:1:0.2724

Help on Cell Dimensions: Cell Dimensions:

a = 6.58, b = 23.937, c = 6.521, Z = 2; alpha = 90.4°, beta = 119.09°, gamma = 95.67° V = 893.12 Den(Calc)= 2.30

Help on Crystal System: Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.26(1), 7.91(0.9), 11.89(0.7),

Click Here for Large Volkovskite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

| | Rastsvetaeva R K , Andrianov V I , Genkina E A , Sokolova T N , Kashaev A A , Kristallografiya , 37 (1992) p.326-333, Crystal structure of volkovskite KCa4B22O32(OH)10Cl�4H2O from Nepkii deposit (E. Siberia), Locality: Eastern Siberia | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Volkovskite

Help on Cleavage: Cleavage:

{010} Perfect, {001} Good

Help on Color: Color:

Colorless, Light orange, Pink.

Help on Density: Density:

2.27 - 2.34, Average = 2.3

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Brittle - Splintery - Brittle fracture leaving splintery fragments.

Help on Hardness: Hardness:

2.5 - Finger Nail

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Volkovskite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.06 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.24,KPDmeas= 0.2406,KC= 0.2559
Ncalc = 1.58 - 1.6

Help on Optical Data: Optical Data:

Biaxial (+), a=1.523-1.536, b=1.53-1.539, g=1.596-1.603, bire=0.0670-0.0730, 2V(Calc)=26-38, 2V(Meas)=24-37.

Calculated Properties of Volkovskite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.33 gm/cc
note: Specific Gravity of Volkovskite =2.31 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PEVolkovskite = 4.28 barns/electron
U=PEVolkovskite x relectron= 9.99 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 92.20 (Gamma Ray American Petroleum Institute Units)
Concentration of Volkovskite per GRapi unit = 1.08 (%)

Estimated Radioactivity from Volkovskite - barely detectable

Volkovskite Classification

Help on Dana Class: Dana Class:

26.05.16.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.05)Dana Type

(26.05.16)Dana Group

26.05.16.01 Volkovskite KCa4[B5O8(OH)4][B(OH)3]Cl•4(H2O) P1 1

Help on Strunz Class: Strunz Class:

06.EC.20 06 - BORATES

06.E - Pentaborates

06.EC -Phyllo-pentaborates

06.EC.20 Volkovskite KCa4[B5O8(OH)4][B(OH)3]Cl•4(H2O) P1 1

Other Volkovskite Information

Help on References: References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Volkovskite :
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

Search for Volkovskite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Volkovskite :

A Bijoux Google Search for Volkovskite
Adam's Minerals Google Search for Volkovskite
Cape Minerals Google Search for Volkovskite
Dakota Matrix Minerals Google Search for Volkovskite
Excalibur Mineral Corp. Google Search for Volkovskite
Exceptional Minerals Google Search for Volkovskite
John Betts Fine Minerals Search for Volkovskite
McDougall Minerals Google Search for Volkovskite
Mineral News Website Link
Rock and Mineral Shows Google Search for Volkovskite
Weinrich Minerals, Inc. Google Search for Volkovskite

Ask about Volkovskite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Volkovskite

KCa4[B5O8(OH)4][B(OH)3]Cl•4(H2O)
Dana No: 26.05.16.01 Strunz No: 06.EC.20
Locality:

Notes: