Paraotwayite
A valid IMA mineral species
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About Paraotwayite
Formula:
Ni(OH)2-x(SO4,CO3)0.5x
Colour:
Emerald-green
Lustre:
Silky
Hardness:
4
Specific Gravity:
3.30
Crystal System:
Monoclinic
Name:
Named from the Greek 'para' for near, and otwayite, for the close compositional and physical similarity to that mineral.
Unique Identifiers
Mindat ID:
3104
Long-form identifier:
mindat:1:1:3104:8
GUID
(UUID V4):
(UUID V4):
8eaa2b00-0938-40d7-a95c-1c207b0030d0
IMA Classification of Paraotwayite
Approved
First published:
1987
Classification of Paraotwayite
7.BB.45
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
B : With medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
B : With medium-sized cations
6.2.12.1
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
12.2.21
12 : Carbonates with other anions
2 : Carbonates with sulphate
12 : Carbonates with other anions
2 : Carbonates with sulphate
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Potw | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Paraotwayite
Silky
Transparency:
Translucent
Colour:
Emerald-green
Streak:
White
Hardness:
4 on Mohs scale
Hardness:
VHN20=223(22) kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None observed
Density:
3.30 g/cm3 (Measured) 3.52 g/cm3 (Calculated)
Optical Data of Paraotwayite
Type:
Biaxial
RI values:
nα = 1.655 nγ = 1.705
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak
Pleochroism:
Weak
Comments:
Bluish green parallel to the fibre length, and yellowish green normal to it.
Chemistry of Paraotwayite
Mindat Formula:
Ni(OH)2-x(SO4,CO3)0.5x
Crystallography of Paraotwayite
Crystal System:
Monoclinic
Cell Parameters:
a = 7.89(1) Å, b = 2.96(1) Å, c = 13.63(3) Å
β = 91.1(2)°
β = 91.1(2)°
Ratio:
a:b:c = 2.666 : 1 : 4.605
Unit Cell V:
318 ų
Z:
6
Morphology:
Fibrous massive, parallel to sub-parallel, may be cross-vein fibrous, to 0.5 mm
Comment:
Point Group: n.d.; Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
6.81 Å | (10) |
5.083 Å | (8) |
2.239 Å | (8) |
3.859 Å | (5) |
2.946 Å | (4) |
1.973 Å | (3) |
7.95 Å | (2) |
Comments:
Only strongest lines
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3b: Earth’s earliest hydrosphere | >4.45 |
13 : Hadean serpentinization | |
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47b : [Sulfates and sulfites] | |
47c : [Carbonates, phosphates, borates, nitrates] | |
47i : [Terrestrial weathering of meteorites] |
Type Occurrence of Paraotwayite
Place of Conservation of Type Material:
Western Australian State Mineral Collection (Government Chemical Laboratories, Perth).
Museum of Victoria, Melbourne, Australia.
Museum of Victoria, Melbourne, Australia.
Associated Minerals at Type Locality:
Reference:
Nickel, E. H. & Graham, J. (1987) Paraotwayite. A new nickel hydroxide mineral from Western Australia. Canadian Mineralogist: 25: 409-411.
Synonyms of Paraotwayite
Other Language Names for Paraotwayite
German:Paraotwayit
Spanish:Paraotwayita
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Paraotwayite associated with Retgersite | NiSO4 · 6H2O |
Related Minerals - Strunz-mindat Grouping
7.BB. | Brumadoite | Cu3(Te6+O4)(OH)4 · 5H2O |
7.BB. | Iskandarovite | Sb6O7(SO4)2 |
7.BB. | Novikovite | (NH4)4Mo6+2Mo5+2O8(SO4)5 |
7.BB.10 | Hauckite | Fe3+3(Mg,Mn2+)24Zn18(SO4)4(CO3)2(OH)81 |
7.BB.15 | Antlerite | Cu3(SO4)(OH)4 |
7.BB.20 | Dolerophanite | Cu2(SO4)O |
7.BB.25 | Brochantite | Cu4(SO4)(OH)6 |
7.BB.25 | Ramaccioniite | Cu4[SeO4](OH)6 |
7.BB.30 | Vergasovaite | Cu3(SO4)(MoO4,SO4)O |
7.BB.30 | Cupromolybdite | Cu3O(MoO4)2 |
7.BB.35 | Klebelsbergite | Sb4O4(SO4)(OH)2 |
7.BB.35 | Tavagnascoite | Bi4O4(SO4)(OH)2 |
7.BB.40 | Schuetteite | Hg2+3(SO4)O2 |
7.BB.50 | Xocomecatlite | Cu3(TeO4)(OH)4 |
7.BB.55 | Pauflerite | (V4+O)SO4 |
7.BB.60 | Grandviewite | Cu3Al2(SO4)(OH)10 · H2O |
7.BB.65 | Timroseite | Pb2Cu5(TeO6)2(OH)2 |
7.BB.70 | Glikinite | Zn3O(SO4)2 |
7.BB.80 | Mojaveite | Cu6[Te6+O4(OH)2](OH)7Cl |
7.BB.85 | Paratimroseite | Pb2Cu4(TeO6)2(H2O)2 |
Fluorescence of Paraotwayite
No fluorescence under LW or SW UV.
Other Information
Notes:
Not attacked by cold HCl or HNO3.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Paraotwayite
mindat.org URL:
https://www.mindat.org/min-3104.html
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Please feel free to link to this page.
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References for Paraotwayite
Localities for Paraotwayite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia (TL) | |
| Nickel et al. (1987) |
Chile | |
| Tom Loomis (Dakotamatrix) +1 other reference |
Quick NavTopAbout ParaotwayiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Otway Ni deposit, Nullagine, East Pilbara Shire, Western Australia, Australia