Hellyerite Mineral Data

General Hellyerite Information

Chemical Formula: NiCO3•6(H2O) Composition: Molecular Weight = 226.79 gm    Nickel    25.88 %  Ni   32.93 % NiO    Hydrogen   5.33 %  H    47.66 % H₂O    Carbon     5.30 %  C    19.41 % CO₂    Oxygen    63.49 %  O             ______        ______              100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: Ni(CO₃)•6(H₂O) Environment: Shear planes in serpentinite. IMA Status: Valid Species (Pre-IMA) 1958 Locality: Old Lord Brassy mine, Heazlewood, TAS, Australia. Link to MinDat.org Location Data. Name Origin: Named for Henry Hellyer (1826-), first surveyor general of Van Dieman's Land, TAS, Australia. Name Pronunciation: Hellyerite + Pronunciation  

Hellyerite Image

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Hellyerite Crystallography

Axial Ratios: a:b:c =1.4755:1:2.5593 Cell Dimensions: a = 10.77, b = 7.299, c = 18.681, Z = 8; beta = 94° V = 1,464.94 Den(Calc)= 2.06 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c X Ray Diffraction: By Intensity(I/I_o): 5.811(1), 9.318(0.89), 5.679(0.43),  

Physical Properties of Hellyerite

Cleavage: {???} Perfect, {???} Very Good, {???} Very Good Color: Light blue. Density: 1.97 Habit: Encrustations - Forms crust-like aggregates on matrix. Hardness: 2.5 - Finger Nail Luster: Vitreous (Glassy) Streak: white  

Optical Properties of Hellyerite

Gladstone-Dale: CI meas= 0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2439,KPDmeas= 0.255,KC= 0.261
Ncalc = 1.51 - 1.54 Optical Data: Biaxial (-), a=1.455, b=1.503, g=1.549, bire=0.0940, 2V(Calc)=86, 2V(Meas)=85.  

Calculated Properties of Hellyerite

Electron Density: Bulk Density (Electron Density)=2.05 gm/cc
note: Specific Gravity of Hellyerite =1.97 gm/cc.
Fermion Index: Fermion Index = 0.0038195967
Boson Index = 0.9961804033 Photoelectric: PE_Hellyerite = 9.90 barns/electron
U=PE_Hellyerite x rElectron Density= 20.29 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hellyerite is Not Radioactive  

Hellyerite Classification

Dana Class: 15.01.07.01 (15)Hydrated Carbonates   (15.01)where A+ (XO3) · x(H2O)   (15.01.07)Dana Group  

15.01.07.01 Hellyerite NiCO3•6(H2O) C 2/c 2/m

Strunz Class: 05.CA.20 05 - CARBONATES (NITRATES)   05.C - Carbonates without Additional Anions, with H2O   05.CA -With medium-sized cations  

05.CA.20 Hellyerite NiCO3•6(H2O) C 2/c 2/m

 

Other Hellyerite Information

References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Hellyerite :
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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