Retgersite Mineral Data

Retgersite Mineral Data +

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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)

IMA Status:

Valid Species (Pre-IMA) 1949

Locality:

Link to MinDat.org Location Data.

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 - TrapezohedralH-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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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

Optical Data:

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

Calculated Properties of Retgersite

Electron Density:

r_electron=2.14 gm/cc
note: r_Retgersite=2.07 gm/cc.

Fermion Index

Fermion Index = 0.00373
Boson Index = 0.99627

Photoelectric:

PE_Retgersite= 9.24 barns/electron
U=PE_Retgersite x r_electron= 19.80 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Retgersite is Not Radioactive

Retgersite Classification

Dana Class:

29.6.9.1 (29)Hydrated Acid and Sulfates

(29.6)where A XO4 · x(H2O)

(29.6.9)Dana Group

29.6.9.1 Retgersite NiSO4·6(H2O) P 4₁2₁2,P 4₃2₁2 4 2 2

Strunz Class:

VI/C.05-70 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size

VI/C.05 - Hexahydrite group

VI/C.05-10 Hexahydrite MgSO4·6(H2O) A2/a 2/m

VI/C.05-20 Ferrohexahydrite FeSO4·6(H2O) C 2/c 2/m

VI/C.05-30 Chvaleticeite (Mn,Mg)SO4·6(H2O) C 2/c 2/m

VI/C.05-40 Moorhouseite (Co,Ni,Mn)SO4·6(H2O) C 2/c 2/m

VI/C.05-50 Nickelhexahydrite (Ni,Mg,Fe)(SO4)·6(H2O) C 2/c 2/m

VI/C.05-60 Bianchite (Zn,Fe)(SO4)·6(H2O) C 2/c 2/m

VI/C.05-70 Retgersite NiSO4·6(H2O) P 4₁2₁2,P 4₃2₁2 4 2 2

Other Retgersite Information

References:

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

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Retgersite

NiSO4·6(H2O)
Dana No: 29.6.9.1 Strunz No: VI/C.05-70
Locality:

Notes: