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 - DomaticH-M Symbol (m) Space Group: Pm 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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