Mineralogy Database

Preobrazhenskite Mineral Data

Search Webmineral :

General Preobrazhenskite Information

Help on Chemical  Formula: Chemical Formula: Mg3B11O15(OH)9
Help on Composition: Composition: Molecular Weight = 584.88 gm
   Magnesium  12.47 %  Mg   20.67 % MgO
   Boron      20.33 %  B    65.47 % B2O3
   Hydrogen    1.55 %  H    13.86 % H2O
   Oxygen     65.65 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3B11O15(OH)9
Help on Environment: Environment: Fne-grained halite�polyhalite rock.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Kazakhstan, in and under the Inder borate deposit. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Pavel Ivanovich Preobrazhenskii (1874-1944), investigator of Russian salt deposits, Institute of Halurgy, St. Petersburg.
Help on Name Pronunciation: Name Pronunciation: Preobrazhenskite + Pronunciation Say PREOBRAZHENSKITE
Help on Synonym: Synonym: ICSD 79143
  PDF 31-788

Preobrazhenskite Image

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


Comments: Crudely formed white to tan translucent preobrazhenskite crystal on yellow crystalline massive material.
Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Preobrazhenskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7833:1:1.1105
Help on Cell Dimensions: Cell Dimensions: a = 16.3, b = 9.14, c = 10.15, Z = 4; V = 1,512.17 Den(Calc)= 2.57
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bcn

Physical Properties of Preobrazhenskite

Help on Color: Color: Colorless, Yellow, Dark gray.
Help on Density: Density: 2.45
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Streak: Streak: white

Optical Properties of Preobrazhenskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2262,KPDmeas= 0.2373,KC= 0.2292
Ncalc = 1.56 - 1.59
Help on Optical Data: Optical Data: Biaxial (+), a=1.573-1.576, b=1.573-1.576, g=1.594-1.596, bire=0.0200-0.0210

Calculated Properties of Preobrazhenskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Preobrazhenskite =2.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEPreobrazhenskite = 0.55 barns/electron
U=PEPreobrazhenskite x rElectron Density= 1.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Preobrazhenskite is Not Radioactive

Preobrazhenskite Classification

Help on  Dana Class: Dana Class: (25)Anhydrous Borates Containing Hydroxyl or Halogen
  (25.07)Dana Type
  (25.07.01)Dana Group Preobrazhenskite Mg3B11O15(OH)9 P bcn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.GB.15 06 - BORATES
  06.G - Heptaborates and other Megaborates
  06.GB -Phyllo-nonborates, etc.
06.GB.15 Preobrazhenskite Mg3B11O15(OH)9 P bcn 2/m 2/m 2/m

Other Preobrazhenskite 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 Preobrazhenskite :
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

Search for Preobrazhenskite using:

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

Visit our Advertisers for Preobrazhenskite :

Ask about Preobrazhenskite 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 Preobrazhenskite Specimen Label here :


Dana No: Strunz No: 06.GB.15





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