Theresemagnanite Mineral Data

General Theresemagnanite Information

Chemical Formula:

(Co,Zn,Ni)6(SO4)(OH,Cl)10•8(H2O)

Composition:

Molecular Weight = 813.42 gm

Zinc 16.08 % Zn 20.01 % ZnO

Cobalt 21.74 % Co 27.64 % CoO

Nickel 7.22 % Ni 9.18 % NiO

Hydrogen 2.97 % H 26.58 % H₂O

Sulfur 3.94 % S 9.84 % SO₃

Chlorine 8.72 % Cl 8.72 % Cl

- % Cl -1.97 % -O=Cl₂

Oxygen 39.34 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Co₃Zn₂Ni(SO₄)(OH)₈Cl₂•8(H₂O)

Environment:

Secondary alteration mineral.

IMA Status:

Approved IMA 1993

Locality:

Cap Garonne mine, Var, France. Link to MinDat.org Location Data.

Name Origin:

Named for Therese Magnan for her contributions to knowledge about the Cap Garrone mine.

Name Pronunciation:

Theresemagnanite + Pronunciation

Synonym:

IMA1991-026

Theresemagnanite Crystallography

Axial Ratios:

a:c = 1:3.13045

Cell Dimensions:

a = 8.363, c = 26.18, Z = 3; V = 1,585.71 Den(Calc)= 2.56

Crystal System:

Hexagonal - Pyramidal H-M Symbol (6) Space Group: P 6₃

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

By Intensity(I/I_o): 13.1(1), 2.527(0.9), 2.681(0.4),

Physical Properties of Theresemagnanite

Cleavage:

{0001} Perfect

Color:

Pink, Light pink.

Density:

2.52

Diaphaneity:

Transparent

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Spherical - Spherical, rounded aggregates.

Habit:

Thin - Flat dimensioned crystals.

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

Non-fluorescent.

Luster:

Pearly

Streak:

white

Optical Properties of Theresemagnanite

Gladstone-Dale:

CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.068 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2168,KPDmeas= 0.2202,KC= 0.2326
Ncalc = 1.59 - 1.6

Optical Data:

Uniaxial (-), e=1.542, w=1.568, bire=0.0260.

Calculated Properties of Theresemagnanite

Electron Density:

Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Theresemagnanite =2.52 gm/cc.

Fermion Index:

Fermion Index = 0.0078961647
Boson Index = 0.9921038353

Photoelectric:

PE_{Theresemagnanite}= 18.65 barns/electron
U=PE_{Theresemagnanite} x rElectron Density= 46.58 barns/cc.

Radioactivity:

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

Theresemagnanite Classification

Dana Class:

31.02.05.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.02)where (A+ B++)6 (XO4) Zqï¿½x(H2O)

(31.02.05)Dana Group

31.02.05.01 Theresemagnanite (Co,Zn,Ni)6(SO4)(OH,Cl)10•8(H2O) P 6₃ 6

Strunz Class:

07.DD.80 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DD -With only medium-sized cations; sheets of edge-sharing octahedra

07.DD.80 Guarinoite (Zn,Co,Ni)6(SO4)(OH,Cl)10•5(H2O) P 6₃/m,P 6₃, or P 6₃22 Hex

07.DD.80 Schulenbergite (Cu,Zn)7(SO4,CO3)2(OH)10•3(H2O) Hex Hex

07.DD.80 Theresemagnanite (Co,Zn,Ni)6(SO4)(OH,Cl)10•8(H2O) P 6₃ 6

Other Theresemagnanite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.78,p1315,1993) OPTIC PROP.(Am.Min.,Vol.78,p1315,1993)

See Also:

Links to other databases for Theresemagnanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Theresemagnanite

(Co,Zn,Ni)6(SO4)(OH,Cl)10•8(H2O)
Dana No: 31.02.05.01 Strunz No: 07.DD.80
Locality:

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