Retgersite Mineral Data

General Retgersite Information

Chemical Formula:

NiSO4•6(H2O)

Composition:

Molecular Weight = 262.85 gm

Nickel 22.33 % Ni 28.42 % NiO

Hydrogen 4.60 % H 41.12 % H₂O

Sulfur 12.20 % S 30.46 % SO₃

Oxygen 60.87 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ni(SO₄)•6(H₂O)

Environment:

Oxidization zone of nickel-bearing hydrothermal mineral deposits, formed from H2O solution between 31.5 deg C and 53.5 deg C. Dimorphous with nickelhexahydrite.

IMA Status:

Valid Species (Pre-IMA) 1949

Locality:

Cottonwood Canyon, Nevada. Link to MinDat.org Location Data.

Name Origin:

Named for Jan Willem Retgers (1856-1896), Dutch physical chemist and chemical crystallographer.

Name Pronunciation:

Retgersite + Pronunciation

Synonym:

ICSD 62051

PDF 47-1811

Retgersite Image

Images:

Retgersite

Comments: Pale blue powdery retgersite on rock.
Location: Mina La Motte, near Frederocktown, Madison County, Missouri, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Retgersite Crystallography

Axial Ratios:

a:c = 1:2.69537

Cell Dimensions:

a = 6.782, c = 18.28, Z = 4; V = 840.80 Den(Calc)= 2.08

Crystal System:

Tetragonal - Trapezohedral H-M Symbol (4 2 2) Space Group: P 4₁2₁2,P 4₃2₁2

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

By Intensity(I/I_o): 4.25(1), 4.57(0.4), 2.964(0.2),

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Forms: ( 0 1 1) ( 1 1 2) ( 1 1 0) ( 0 1 2) ( 0 0 1)

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Physical Properties of Retgersite

Cleavage:

{001} Perfect

Color:

Dark green.

Density:

2.07

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Retgersite

Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.24,KPDmeas= 0.2411,KC= 0.2437
Ncalc = 1.5 - 1.51

Optical Data:

Uniaxial (-), e=1.4873, w=1.5109, bire=0.0236.

Calculated Properties of Retgersite

Electron Density:

Bulk Density (Electron Density)=2.14 gm/cc
note: Specific Gravity of Retgersite =2.07 gm/cc.

Fermion Index:

Fermion Index = 0.0037371925
Boson Index = 0.9962628075

Photoelectric:

PE_Retgersite= 9.24 barns/electron
U=PE_Retgersite x rElectron Density= 19.80 barns/cc.

Radioactivity:

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

Retgersite Classification

Dana Class:

29.06.09.01 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 ï¿½ x(H2O)

(29.06.09)Dana Group

29.06.09.01 Retgersite NiSO4•6(H2O) P 4₁2₁2,P 4₃2₁2 4 2 2

Strunz Class:

07.CB.30 07 - SULFATES (SELENATES, TELLURATES)

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

07.CB -With only medium-sized cations

07.CB.30 Retgersite NiSO4•6(H2O) P 4₁2₁2,P 4₃2₁2 4 2 2

Other Retgersite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Retgersite :
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 Retgersite Specimen Label here :

Retgersite

NiSO4•6(H2O)
Dana No: 29.06.09.01 Strunz No: 07.CB.30
Locality:

Notes:

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