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Otwayite

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Formula:
Ni
 
2
(CO
 
3
)(OH)
 
2
· H
 
2
O
System:OrthorhombicColour:Green
Hardness:4


A mineral closely related to paraotwayite.

Classification of Otwayite

IMA status:Approved
Strunz 8th edition ID:5/E.05-10
Nickel-Strunz 10th (pending) edition ID:5.DA.15

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
Dana 8th edition ID:16b.3.2.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : AmBn(XO3)pZqxH2O & with (m+n):p = 2:1
Hey's CIM Ref.:11.14.5

11 : Carbonates
14 : Carbonates of Co and Ni
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Type Occurrence of Otwayite

Type Locality:Otway Ni deposit, Nullagine, East Pilbara Shire, Western Australia, Australia
Year of Discovery:1977

Physical Properties of Otwayite

Colour:Green
Hardness (Mohs):4
Density (measured):3.41 g/cm3
Density (calculated):3.346 g/cm3

Crystallography of Otwayite

Crystal System:Orthorhombic
Cell Parameters:a = 10.18Å, b = 27.4Å, c = 3.22Å
Ratio:a:b:c = 0.372 : 1 : 0.118
Unit Cell Volume:V 898.16 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
(

Optical Data of Otwayite

Type:Biaxial
RI values: nα = 1.650 nγ = 1.720
Maximum Birefringence:δ = 0.070

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:very strong

Chemical Properties of Otwayite

Formula:
Ni
 
2
(CO
 
3
)(OH)
 
2
· H
 
2
O
Simplified for copy/paste:Ni2(CO3)(OH)2·H2O
Essential elements:C, H, Ni, O
All elements listed in formula:C, H, Ni, O
Common Impurities:Mg

Relationship of Otwayite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.DA.05Dypingite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 5H
 
2
O
5.DA.05Giorgiosite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 5-6H
 
2
O
5.DA.05Hydromagnesite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 4H
 
2
O
5.DA.05Widgiemoolthalite
Ni
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 5H
 
2
O
5.DA.05UM1986-10-CO:ClHMgMnZn
Mg
 
5
(Zn,Mn)
 
3
(CO
 
3
)
 
2
(OH,Cl)
 
12
· H
 
2
O
5.DA.05UM1987-01-CO:HMgS
Mg
 
4
(CO
 
3
)
 
2
(OH)
 
2
· 6H
 
2
O ?
5.DA.10Artinite
Mg
 
2
(CO
 
3
)(OH)
 
2
· 3H
 
2
O
5.DA.10Indigirite
Mg
 
2
Al
 
2
(CO
 
3
)
 
4
(OH)
 
2
· 15H
 
2
O
5.DA.10Chlorartinite
Mg
 
2
(CO
 
3
)(OH)Cl · 2H
 
2
O
5.DA.15Zaratite
Ni
 
3
(CO
 
3
)(OH)
 
4
· 4H
 
2
O
5.DA.20Kambaldaite
NaNi
 
4
(CO
 
3
)
 
3
(OH)
 
3
· 3H
 
2
O
5.DA.25Callaghanite
Cu
 
2
Mg
 
2
(CO
 
3
)(OH)
 
6
· 2H
 
2
O
5.DA.30Claraite
(Cu,Zn)
 
3
(CO
 
3
)(OH)
 
4
· 4H
 
2
O
5.DA.35Hydroscarbroite
Al
 
14
(CO
 
3
)
 
3
(OH)
 
36
· nH
 
2
O
5.DA.35Scarbroite
Al
 
5
(CO
 
3
)(OH)
 
13
· 5H
 
2
O
5.DA.40Caresite
Fe
2+
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.40Quintinite
Mg
 
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.40Charmarite
Mn
2+
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.45Stichtite-2H
Mg
 
6
(Cr,Al)
 
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O
5.DA.45Brugnatellite
Mg
 
6
Fe
3+
 
(CO
 
3
)(OH)
 
13
· 4H
 
2
O
5.DA.45Chlormagaluminite
Mg
 
4
Al
 
2
(OH)
 
12
Cl
 
2
· 3H
 
2
O
5.DA.45Hydrotalcite-2H
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O
5.DA.45Pyroaurite-2H
Mg
 
6
Fe
3+
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O
5.DA.45Zaccagnaite
Zn
 
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.50Comblainite
Ni
 
4
Co
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.50Desautelsite
Mg
 
6
Mn
3+
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Hydrotalcite
Mg
 
6
Al
 
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Pyroaurite
Mg
 
6
Fe
3+
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Reevesite
Ni
 
6
Fe
3+
2
(OH)
 
16
(CO
 
3
) · 4H
 
2
O
5.DA.50Stichtite
Mg
 
6
Cr
 
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Takovite
Ni
 
6
Al
 
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50UM1998-10-CO:CoHNi
Co
 
6
Fe
 
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O ?
5.DA.55Coalingite
Mg
 
10
Fe
3+
2
(OH)
 
24
[CO
 
3
] · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.14.1Spherocobaltite
CoCO
 
3
11.14.2Kolwezite
(Cu,Co)
 
2
(CO
 
3
)(OH)
 
2
11.14.3Nullaginite
Ni
 
2
(CO
 
3
)(OH)
 
2
11.14.4Hellyerite
NiCO
 
3
· 6H
 
2
O
11.14.6Zaratite
Ni
 
3
(CO
 
3
)(OH)
 
4
· 4H
 
2
O
11.14.7Kambaldaite
NaNi
 
4
(CO
 
3
)
 
3
(OH)
 
3
· 3H
 
2
O
11.14.8Glaukosphaerite
(Cu,Ni)
 
2
(CO
 
3
)(OH)
 
2
11.14.9Gaspéite
(Ni,Mg,Fe)CO
 
3
11.14.10Reevesite
Ni
 
6
Fe
3+
2
(OH)
 
16
(CO
 
3
) · 4H
 
2
O
11.14.11Comblainite
Ni
 
4
Co
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
11.14.12Szymańskiite
Hg
 
16
(Ni,Mg)
 
6
(CO
 
3
)
 
12
(OH)
 
12
· 11H
 
2
O

Other Names for Otwayite

Synonyms:
IMA1976-028
Other Languages:
German:Otwayit
Spanish:Otwayita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Otwayite

Reference List:

- +
Nickel, E. H., Robinson, B. W., Davis, C. E. S. & MacDonald, R. D. (1977): Otwayite, a new nickel mineral from Western Australia. American Mineralogist: 62: 999-1002.

Internet Links for Otwayite

Search Engines:
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  • External Links:
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  • Look for Otwayite on Athena Mineralogy
  • Look for Otwayite on Wikipedia
  • Look for Otwayite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Otwayite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Fine Minerals from Weinrich Minerals, Inc.
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  • Search for Otwayite on Well-Arranged Molecules
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  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Lapis Mineral Magazin
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  • Buy fine minerals and gemstones from Pala International
  • Otwayite specimens for sale - minfind.com
  • SpiriferMinerals.com - high quality low prices
  • Buy from McDougall Minerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • Localities for Otwayite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Tasmania
      • Heazlewood district
    Henry, D. A. & Birch, W. D. (1992): Otwayite and theophrastite from the Lord Brassey Mine, Tasmania. Mineral. Mag. 56, 252-255.; Anderson, P., Bottrill, R. & Davidson, P. (2002): Famous mineral localities: The Lord Brassey mine, Tasmania. Mineralogical Record 33, 321-332
    • Western Australia
      • Coolgardie Shire
        • Widgiemooltha
    No reference listed
      • East Pilbara Shire
        • Nullagine
    Nickel, E. H.; Hallbert, J. A.; Halligan, R. (1979): Unusual nickel mineralization at Nullagine, Western Australia. Journal of the Geological Society of Australia 26, 61-71. ; Nickel, E. H., Robinson, B. W., Davis, C. E. S. & MacDonald, R. D. (1977): Otwayite, a new nickel mineral from Western Australia. American Mineralogist 62, 999-1002.
    South Africa
     
    • Limpopo Province
      • Mabilikewe Hill
    Minerals of South Africa
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