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

Images:

Hellyerite

Comments: Green botryoidal hellyerite on matrix.
Location: Lord Brassey Mine, Heazlewood, Tasmania, Australia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

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 - Prismatic H-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ 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) ï¿½ 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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Print or Cut-and-Paste your Hellyerite Specimen Label here :

Hellyerite

NiCO3•6(H2O)
Dana No: 15.01.07.01 Strunz No: 05.CA.20
Locality:

Notes:

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