Mineralogy Database

Karchevskyite Mineral Data

Search Webmineral :

General Karchevskyite Information

Help on Chemical  Formula: Chemical Formula: [Mg18Al9(OH)54][Sr2(CO3,PO4)9(H2O,H3O)11]
Help on Composition: Composition: Molecular Weight = 2,507.53 gm
   Strontium    6.25 %  Sr    7.40 % SrO
   Calcium      0.14 %  Ca    0.20 % CaO
   Magnesium   17.91 %  Mg   29.70 % MgO
   Aluminum     9.68 %  Al   18.30 % Al2O3
   Phosphorus   0.57 %  P     1.30 % P2O5
   Hydrogen     3.20 %  H    28.60 % H2O
   Carbon       3.96 %  C    14.50 % CO2
   Oxygen      58.28 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg18Al9OH54Sr1.79Mg0.48Ca0.09(CO3)8.26(PO4)0.46(H2O)6.54(H3O)4.18
Help on Environment: Environment: Late-stage hydrothermal mineral in an Iron open pit. Layered double hydroxide.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Zhelezny mine, Kovdor carbonatite massif, Kola Peninsula, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Pavel Karchevsky (1976-2002), Russian mineralogist who made a significant contribution to the study of carbonatites.
Help on Synonym: Synonym: IMA2005-015a

Karchevskyite Image

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


Comments: Colorless hexagonal plates of karchevskyite, co-type material, associated with phlogopite, dolomite, pyrite, and magnetite.
Location: Zheleznyi mine, Kovdor Massif, Kola Peninsula, Russia. Scale: See Image.
© Rruff Database

Karchevskyite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.59825
Help on Cell Dimensions: Cell Dimensions: a = 16.055, c = 25.66, Z = 3; V = 5,728.07 Den(Calc)= 2.18
Help on Crystal System: Crystal System: Trigonal Space Group: P 3, P 31m, P 31m, P 312
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.52(1), 3.547(0.9), 3.665(0.9),3.081(0.6), 4.27(0.6), 6.41(0.6), 5.13(0.3), 2.513(0.1),

Physical Properties of Karchevskyite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: White, Colorless.
Help on Density: Density: 2.21
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Karchevskyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2468,KPDmeas= 0.2434,KC= 0.2386
Ncalc = 1.52 - 1.53
Help on Optical Data: Optical Data: Uniaxial (-), e=1.534, w=1.542, bire=0.0080.

Calculated Properties of Karchevskyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.25 gm/cc
note: Specific Gravity of Karchevskyite =2.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEKarchevskyite = 7.36 barns/electron
U=PEKarchevskyite x rElectron Density= 16.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Karchevskyite is Not Radioactive

Karchevskyite Classification

Help on  Dana Class: Dana Class: (06)Hydroxides and Oxides Containing Hydroxyl
  (06.04)containing multiple cations
  (06.04.15)Dana Group Karchevskyite! [Mg18Al9(OH)54][Sr2(CO3,PO4)9(H2O,H3O)11] P 3, P 31m, P 31m, P 312 Trig
Help on  Strunz Class: Strunz Class: 05.DA.60 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.60 Karchevskyite! [Mg18Al9(OH)54][Sr2(CO3,PO4)9(H2O,H3O)11] P 3, P 31m, P 31m, P 312 Trig

Other Karchevskyite Information

Help on References: References: NAME( Geology of Ore Deposits, v50:556) PHYS. PROP.(Geology of Ore Deposits, v50:556) OPTIC PROP.(Geology of Ore Deposits, v50:556)
Help on See Also: See Also: Links to other databases for Karchevskyite :
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

Search for Karchevskyite using:

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

Visit our Advertisers for Karchevskyite :

Ask about Karchevskyite 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´┐Żol

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


Dana No: Strunz No: 05.DA.60





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.