Paraotwayite Mineral Data

General Paraotwayite Information

Chemical Formula:

Ni(OH)2-x(SO4,CO3)0.5x x=.5

Composition:

Molecular Weight = 103.71 gm

Nickel 56.59 % Ni 72.02 % NiO

Hydrogen 1.46 % H 13.03 % H₂O

Carbon 1.45 % C 5.30 % CO₂

Sulfur 3.86 % S 9.65 % SO₃

Oxygen 36.64 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ni(OH)_1.5(SO₄)_0.12(CO₃)_0.12

IMA Status:

Approved IMA 1987

Locality:

Otway nickel deposit, Nullagine, Pilbara region, WA. Australia. Link to MinDat.org Location Data.

Name Origin:

Named for its close physical and chemical resemblance to otwayite.

Name Pronunciation:

Paraotwayite + Pronunciation

Paraotwayite Image

Images:

Paraotwayite

Comments: Pale green, fibrous, silky, free standing paraotwayite crystals to about 0.25mm.
Location: Vaca Murta meteorite, Taltal, Atacama, Chile. Scale: Crystal size .25 mm.
© Tom Loomis / Dakota Matrix

Paraotwayite Crystallography

Axial Ratios:

a:b:c =2.6655:1:4.6047

Cell Dimensions:

a = 7.89, b = 2.96, c = 13.63, Z = 6; beta = 91.1° V = 318.26 Den(Calc)= 3.25

Crystal System:

Monoclinic - Domatic H-M Symbol (m) Space Group: Pm

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

By Intensity(I/I_o): 6.81(1), 2.239(0.8), 5.083(0.8),

Physical Properties of Paraotwayite

Cleavage:

None

Color:

Emerald green.

Density:

3.3

Diaphaneity:

Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

4 - Fluorite

Luster:

Silky

Streak:

white

Optical Properties of Paraotwayite

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2092,KPDmeas= 0.2061,KC= 0.1993
Ncalc = 1.65 - 1.66

Optical Data:

Biaxial (?), a=1.655, g=1.705, bire=0.0500

Calculated Properties of Paraotwayite

Electron Density:

Bulk Density (Electron Density)=3.26 gm/cc
note: Specific Gravity of Paraotwayite =3.30 gm/cc.

Fermion Index:

Fermion Index = 0.0070218815
Boson Index = 0.9929781185

Photoelectric:

PE_Paraotwayite= 22.52 barns/electron
U=PE_Paraotwayite x rElectron Density= 73.44 barns/cc.

Radioactivity:

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

Paraotwayite Classification

Dana Class:

06.02.12.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.02)where X++ (OH)2

(06.02.12)Dana Group

06.02.12.01 Paraotwayite Ni(OH)2-x(SO4,CO3)0.5xx=.5 Pm m

Strunz Class:

07.BB.45 07 - SULFATES (SELENATES, TELLURATES)

07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O

07.BB -With medium-sized cations

07.BB.45 Paraotwayite Ni(OH)2-x(SO4,CO3)0.5xx=.5 Pm m

Other Paraotwayite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.73,p1496,1988)

See Also:

Links to other databases for Paraotwayite :
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

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

Paraotwayite

Ni(OH)2-x(SO4,CO3)0.5x x=.5
Dana No: 06.02.12.01 Strunz No: 07.BB.45
Locality:

Notes:

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