Omongwaite  Mineral Data

Omongwaite Mineral Data

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


General Omongwaite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca5(SO4)6•3H2O
Help on Composition: Composition: Molecular Weight = 880.31 gm
   Potassium   2.62 %  K     3.16 % K2O
   Sodium      3.84 %  Na    5.17 % Na2O
   Calcium    21.67 %  Ca   30.32 % CaO
   Hydrogen    0.69 %  H     6.14 % H2O
   Sulfur     22.11 %  S    55.21 % SO3
   Oxygen     49.07 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.47K0.59Ca4.76S6.07O24•3(H2O)
Help on Environment: Environment: Found in inclusions in gypsum crystals in recent salt lake deposits. Related to bassanite.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Omongwa (salt) pan, near Aminuis, 140 km SSE of Gobabis, southwestern Kalahari, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Synonym: Synonym: IMA2003-054b
 

Search for Omongwaite 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.

  

Omongwaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7356:1:0.9181
Help on Cell Dimensions: Cell Dimensions: a = 12.08, b = 6.96, c = 6.39, Z = 1; beta = 90.2° V = 537.25 Den(Calc)= 2.72
Help on Crystal System: Crystal System: Monoclinic - SphenoidalH-M Symbol (2) Space Group: C 2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.014(1), 2.82(0.65), 3.019(0.51),6.028(0.4), 2.824(0.34), 3.484(0.29), 1.855(0.24), 1.853(0.23),
Click Here for Large Omongwaite 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


Freyer D , Reck G , Bremer M , Voigt W , Monatshefte fur Chemie , 130 (1999) p.1179-1193, Thermal behaviour and crystal structure of sodium-containing hemihydrates, of calcium sulfate, Note: supercell, Locality: synthetic

 

Physical Properties of Omongwaite

Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Omongwaite

Help on Optical Data: Optical Data: NCalc= 1.54 - from Gladstone-Dale relationship (KC = 0.1983) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Omongwaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Omongwaite =2.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.002190571
Boson Index = 0.997809429
Help on Photoelectric: Photoelectric: PEOmongwaite = 4.31 barns/electron
U=PEOmongwaite x relectron= 11.77 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 37.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Omongwaite per GRapi unit = 2.64 (%)

Estimated Radioactivity from Omongwaite - barely detectable

 

Omongwaite Classification

Help on  Dana Class: Dana Class: 29.04.07.02 (29)Hydrated Acid and Sulfates
  (29.04)where (A+)2 Bn (XO4)p · x(H2O)
  (29.04.07)Dana Group
 
29.04.07.01 Gorgeyite K2Ca5(SO4)6•(H2O) C 2/c 2/m
 
29.04.07.02 Omongwaite! Na2Ca5(SO4)6•3H2O C 2 2
Help on  Strunz Class: Strunz Class: 07.CD.65 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CD -With only large cations
 
07.CD.65 Omongwaite! Na2Ca5(SO4)6•3H2O C 2 2
 

Other Omongwaite Information

Help on References: References: NAME( MinMag, v72:1307) PHYS. PROP.(MinMag, v72:1307)
Help on See Also: See Also: Links to other databases for Omongwaite :
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 Omongwaite using:

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

Visit our Advertisers for Omongwaite :

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

Ask about Omongwaite 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 Omongwaite Specimen Label here :

Omongwaite

Na2Ca5(SO4)6•3H2O
Dana No: 29.04.07.02 Strunz No: 07.CD.65
Locality:

 

Notes: