Mineralogy Database

Otwayite Mineral Data

Search Webmineral :

General Otwayite Information

Help on Chemical  Formula: Chemical Formula: Ni2(CO3)(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 229.42 gm
   Nickel    51.16 %  Ni   65.11 % NiO
   Hydrogen   1.76 %  H    15.71 % H2O
   Carbon     5.24 %  C    19.18 % CO2
   Oxygen    41.84 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ni2(CO3)(OH)2•(H2O)
Help on Environment: Environment: Late-stage fracture filling.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Otway Ni prospect, 23 km north of the town of Nullagine, Pilbara region, Western Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Charles Albert Otway (1922-), miner and prospector of Cosnells, WA, Australia.
Help on Name Pronunciation: Name Pronunciation: Otwayite Say OTWAYITE

Otwayite Image

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


Comments: Pale green botryoidal otwayite on serpentinite rock.
Location: Otway Prospect, Nullagin Plain, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Otwayite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3715:1:0.1175
Help on Cell Dimensions: Cell Dimensions: a = 10.18, b = 27.4, c = 3.22, Z = 8; V = 898.16 Den(Calc)= 3.39
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.84(1), 5.67(0.8), 2.737(0.6),

Physical Properties of Otwayite

Help on Color: Color: Green, Bright green.
Help on Density: Density: 3.41
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Silky
Help on Streak: Streak: light green

Optical Properties of Otwayite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2021,KPDmeas= 0.2009,KC= 0.2085
Ncalc = 1.71
Help on Optical Data: Optical Data: Biaxial (?), a=1.65, g=1.72, bire=0.0700
Help on Pleochroism (x): Pleochroism (x): pale green.
Help on Pleochroism (y): Pleochroism (y): darker green.
Help on Pleochroism (z): Pleochroism (z): darker green.

Calculated Properties of Otwayite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Otwayite =3.39 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0065609081
Boson Index = 0.9934390919
Help on Photoelectric: Photoelectric: PEOtwayite = 20.10 barns/electron
U=PEOtwayite x rElectron Density= 67.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Otwayite is Not Radioactive

Otwayite Classification

Help on  Dana Class: Dana Class: 16b.03.02.01 (16b)Carbonates - Hydroxyl or Halogen
  (16b.03)where Am Bn (XO3)p Zq � x(H2O), (m+n):p = 2:1
  (16b.03.02)Dana Group
16b.03.02.01 Otwayite Ni2(CO3)(OH)2•(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 05.DA.15 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.15 Otwayite Ni2(CO3)(OH)2•(H2O) Unk Ortho

Other Otwayite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Otwayite :
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 Otwayite using:

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

Visit our Advertisers for Otwayite :

Ask about Otwayite 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 Español

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


Dana No: 16b.03.02.01 Strunz No: 05.DA.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.