Otwayite Mineral Data

General Otwayite Information

Chemical Formula:

Ni2(CO3)(OH)2•(H2O)

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

Empirical Formula:

Ni₂(CO₃)(OH)₂•(H₂O)

Environment:

Late-stage fracture filling.

IMA Status:

Approved IMA 1977

Locality:

Otway Ni prospect, 23 km north of the town of Nullagine, Pilbara region, Western Australia. Link to MinDat.org Location Data.

Name Origin:

Named after Charles Albert Otway (1922-), miner and prospector of Cosnells, WA, Australia.

Name Pronunciation:

Otwayite

Otwayite Image

Images:

Otwayite

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

Axial Ratios:

a:b:c =0.3715:1:0.1175

Cell Dimensions:

a = 10.18, b = 27.4, c = 3.22, Z = 8; V = 898.16 Den(Calc)= 3.39

Crystal System:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.84(1), 5.67(0.8), 2.737(0.6),

Physical Properties of Otwayite

Color:

Green, Bright green.

Density:

3.41

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

4 - Fluorite

Luster:

Silky

Streak:

light green

Optical Properties of Otwayite

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

Optical Data:

Biaxial (?), a=1.65, g=1.72, bire=0.0700

Pleochroism (x):

pale green.

Pleochroism (y):

darker green.

Pleochroism (z):

darker green.

Calculated Properties of Otwayite

Electron Density:

Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Otwayite =3.39 gm/cc.

Fermion Index:

Fermion Index = 0.0065609081
Boson Index = 0.9934390919

Photoelectric:

PE_Otwayite= 20.10 barns/electron
U=PE_Otwayite x rElectron Density= 67.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Otwayite is Not Radioactive

Otwayite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

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:

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

Visit our Advertisers for Otwayite :

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

Otwayite

Ni2(CO3)(OH)2•(H2O)
Dana No: 16b.03.02.01 Strunz No: 05.DA.15
Locality:

Notes: