Mineralogy Database

Widgiemoolthalite Mineral Data

Search Webmineral :

General Widgiemoolthalite Information

Help on Chemical  Formula: Chemical Formula: (Ni,Mg)5(CO3)4(OH)2•4-5(H2O)
Help on Composition: Composition: Molecular Weight = 596.99 gm
   Magnesium   6.11 %  Mg   10.13 % MgO
   Nickel     34.41 %  Ni   43.79 % NiO
   Hydrogen    1.86 %  H    16.60 % H2O
   Carbon      8.05 %  C    29.49 % CO2
   Oxygen     49.58 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ni3.5Mg1.5(CO3)4(OH)2•4.5(H2O)
Help on Environment: Environment: Found with other secondary nickel minerals in the mined ore stockpile.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: 132 North Nickel mine, 4 km SW of Widgiemooltha, 80 km S of Kalgoorlie, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Widgiemoolthalite + Pronunciation Say WIDGIEMOOLTHALITE
Help on Synonym: Synonym: IMA1992-006

Widgiemoolthalite Image

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


Comments: Green crystals of widgiemoolthalite.
Location: 132 North Mine, Widgiemooltha, Western Australia, Australia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Widgiemoolthalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1497:1:0.9508
Help on Cell Dimensions: Cell Dimensions: a = 10.06, b = 8.75, c = 8.32, Z = 2; beta = 114.3° V = 667.48 Den(Calc)= 2.97
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.75(1), 6.3(0.5), 4.36(0.4),

Physical Properties of Widgiemoolthalite

Help on Cleavage: Cleavage: {hk0} Perfect, {hk0} Perfect
Help on Color: Color: Blue green, Green.
Help on Density: Density: 3.13
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Silky
Help on Streak: Streak: apple green

Optical Properties of Widgiemoolthalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.061 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2138,KPDmeas= 0.2029,KC= 0.216
Ncalc = 1.64 - 1.68
Help on Optical Data: Optical Data: Biaxial (+), a=1.63, g=1.64, bire=0.0100, 2V(Meas)=high.

Calculated Properties of Widgiemoolthalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Widgiemoolthalite =2.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEWidgiemoolthalite = 13.63 barns/electron
U=PEWidgiemoolthalite x rElectron Density= 40.55 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Widgiemoolthalite is Not Radioactive

Widgiemoolthalite Classification

Help on  Dana Class: Dana Class: 16b.07.01.02 (16b)Carbonates - Hydroxyl or Halogen
  (16b.07)Dana Type
  (16b.07.01)Dana Group
16b.07.01.01 Hydromagnesite Mg5(CO3)4(OH)2•4(H2O) P 21/c 2/m
16b.07.01.02 Widgiemoolthalite (Ni,Mg)5(CO3)4(OH)2•4-5(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 05.DA.05 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.05 Dypingite Mg5(CO3)4(OH)2•5(H2O) Unk. Mono
05.DA.05 Giorgiosite Mg5(CO3)4(OH)2•5(H2O) ? Mono
05.DA.05 Hydromagnesite Mg5(CO3)4(OH)2•4(H2O) P 21/c 2/m
05.DA.05 Widgiemoolthalite (Ni,Mg)5(CO3)4(OH)2•4-5(H2O) P 21/c 2/m

Other Widgiemoolthalite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.78,p819-821,1993) OPTIC PROP.(Am.Min.,Vol.78,p819-821,1993)
Help on See Also: See Also: Links to other databases for Widgiemoolthalite :
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 Widgiemoolthalite using:

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

Visit our Advertisers for Widgiemoolthalite :

Ask about Widgiemoolthalite 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 Widgiemoolthalite Specimen Label here :


Dana No: 16b.07.01.02 Strunz No: 05.DA.05





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