Pseudosinhalite Mineral Data

Pseudosinhalite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About


General Pseudosinhalite Information

Help on Chemical Formula: Chemical Formula: Mg2Al3B2O9(OH)
Help on Composition: Composition: Molecular Weight = 312.18 gm
   Magnesium  15.57 %  Mg   25.82 % MgO
   Aluminum   25.93 %  Al   48.99 % Al2O3
   Boron       6.93 %  B    22.30 % B2O3
   Hydrogen    0.32 %  H     2.89 % H2O
   Oxygen     51.25 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2Al3B2O9(OH)
Help on Environment: Environment: Associated with hydrotalcite and occurs at the Tayozhnoye Fe-B skarn as a toptactic, retrograde replacement of sinhalite in metasomatized marble.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Aldan Shield, southern Sakha - Yakutia Republic, Russian Federation. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name alludes to the optical, chemical, and structural similarity to sinhalite.
Help on Name Pronunciation: Name Pronunciation: Pseudosinhalite + Pronunciation Say PSEUDOSINHALITE
Help on Synonym: Synonym: IMA1997-014
 

Search for Pseudosinhalite Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

Pseudosinhalite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.7297:1:2.2748
Help on Cell Dimensions: Cell Dimensions: a = 7.49, b = 4.33, c = 9.85, Z = 2; beta = 110.7° V = 298.83 Den(Calc)= 3.47
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.625(1), 2.14(1), 2.102(0.6),
Click Here for Large Pseudosinhalite 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


Daniels P , Krosse S , Werding G , Schreyer W , Contributions to Mineralogy and Petrology , 128 (1997) p.261-271, Pseudosinhalite , a new hydrous MgAl-borate: synthesis, phase characterization,, crystal structure, and PT-stability, Locality: synthetic

 

Physical Properties of Pseudosinhalite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 3.608 - 3.508, Average = 3.55
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Pseudomorphous - Occurs in the form of another mineral.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Pseudosinhalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.205,KPDmeas= 0.1999,KC= 0.2108
Ncalc = 1.73 - 1.76
Help on Optical Data: Optical Data: Biaxial (-), a=1.691, b=1.713, g=1.73, bire=0.0390
 

Calculated Properties of Pseudosinhalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Pseudosinhalite =3.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEPseudosinhalite = 1.18 barns/electron
U=PEPseudosinhalite x rElectron Density= 4.05 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pseudosinhalite is Not Radioactive
 

Pseudosinhalite Classification
Help on Dana Class: Dana Class: 25.08.03.01 (25)Anhydrous Borates Containing Hydroxyl or Halogen
  (25.08)Dana Type
  (25.08.03)Dana Group
 
25.08.03.01 Pseudosinhalite! Mg2Al3B2O9(OH) P 21/c 2/m
Help on Strunz Class: Strunz Class: 06.AC.10 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
 
06.AC.10 Pseudosinhalite! Mg2Al3B2O9(OH) P 21/c 2/m
 

Other Pseudosinhalite Information
Help on References: References: NAME( AmMin, Vol 84, No. 7-8) PHYS. PROP.(AmMin, Vol 84, No. 7-8) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Pseudosinhalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

Search for Pseudosinhalite using:

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

Visit our Advertisers for Pseudosinhalite :

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

Ask about Pseudosinhalite 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 Espaņol

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

Pseudosinhalite

Mg2Al3B2O9(OH)
Dana No: 25.08.03.01 Strunz No: 06.AC.10
Locality:

 

Notes: