Bararite Mineral Data

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


Dakota Matrix
[Newest Minerals] [Rare Minerals] [Cabinet Specimens] [About Us] [Image Gallery]
Dakota Matrix Minerals
Updated weekly, for the collector, educator, and researcher since 1996
Extensive Inventory of very Rare Minerals. Visa and Mastercard are Welcome


General Bararite Information

Help on Chemical Formula: Chemical Formula: (NH4)2SiF6
Help on Composition: Composition: Molecular Weight = 178.15 gm
   Silicon   15.76 %  Si   33.73 % SiO2
   Hydrogen   4.53 %  H      -   % Calc as (NH4)2O
   Nitrogen  15.72 %  N    29.23 % (NH4)2O
   Fluorine  63.98 %  F    63.98 % F
               -   %   F   -26.94 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)2SiF6
Help on Environment: Environment: Above a burning coal seam. Dimorphous with cryptohalite, the higher-temperature form.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1951
Help on Locality: Locality: Bararee colliery, Barari, Jharia coalfield, West Bengal, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Bararite Say BARARITE
Help on Synonym: Synonym: ICSD 18027
  PDF 44-1424
 

Bararite Image

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

Bararite   Cryptohalite

Comments: White crystalline bararite intermixed with cryptohalite colored yellow by selenium.
Location: Shamokin, Northumberland County, Pennsylvani, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bararite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.82812
Help on Cell Dimensions: Cell Dimensions: a = 5.76, c = 4.77, Z = 1; V = 137.05 Den(Calc)= 2.16
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Click Here for Large Bararite 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


Schlemper E O , Hamilton W C , Journal of Chemical Physics , 45 (1966) p.408-409, On the structure of trigonal ammonium fluorosilicate, Locality: synthetic

 

Physical Properties of Bararite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: White.
Help on Density: Density: 2.152
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Bararite

Help on Optical Data: Optical Data: Uniaxial (-), e=1.391, w=1.406, bire=0.0150.
 

Calculated Properties of Bararite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Bararite =2.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEBararite = 0.97 barns/electron
U=PEBararite x rElectron Density= 2.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bararite is Not Radioactive
 

Bararite Classification
Help on Dana Class: Dana Class: 11.05.02.02 (11)Halide Complexes; Alumino-fluorides
  (11.05)where (A)m B (X)6
  (11.05.02)Malladrite Group
 
11.05.02.01 Malladrite Na2SiF6 P 321 3 2
 
11.05.02.02 Bararite (NH4)2SiF6 R 3m 3 2/m
 
11.05.02.03 Demartinite! K2[SiF6] P 63mc 6mm
Help on Strunz Class: Strunz Class: 03.CH.10 03 - HALIDES
  03.C - Complex Halides
  03.CH -
 
03.CH.10 Bararite (NH4)2SiF6 R 3m 3 2/m
 

Other Bararite Information
Help on References: References: NAME( AntBidBlaNic3) 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 Bararite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Bararite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bararite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Bararite Mineral Data :

Ask about Bararite 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 Bararite Specimen Label here :

Bararite

(NH4)2SiF6
Dana No: 11.05.02.02 Strunz No: 03.CH.10
Locality:

 

Notes: