Guarinoite Mineral Data

General Guarinoite Information

Chemical Formula:

(Zn,Co,Ni)6(SO4)(OH,Cl)10•5(H2O)

Composition:

Molecular Weight = 772.29 gm

Zinc 33.87 % Zn 42.15 % ZnO

Cobalt 7.63 % Co 9.70 % CoO

Nickel 7.60 % Ni 9.67 % NiO

Hydrogen 2.35 % H 20.99 % H₂O

Sulfur 4.15 % S 10.37 % SO₃

Chlorine 9.18 % Cl 9.18 % Cl

- % Cl -2.07 % -O=Cl₂

Oxygen 35.22 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₄CoNi(SO₄)(OH)₈Cl₂•5(H₂O)

Environment:

Secondary mineral in the zone of oxidation.

IMA Status:

Approved IMA 1993

Locality:

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

Name Origin:

Named for Andre Guarino, French mineral collector.

Name Pronunciation:

Guarinoite + Pronunciation

Synonym:

IMA1991-005

Guarinoite Image

Images:

Guarinoite

Comments: Pale pink microcrystalline crust of guarinoite on matrix.
Location: Cap Garonne mine, Var, France. Scale: Thumbnail.
© Tom Loomis / Dakota Matrix

Guarinoite Crystallography

Axial Ratios:

a:c = 1:2.58856

Cell Dimensions:

a = 8.344, c = 21.599, Z = 3; V = 1,302.31 Den(Calc)= 2.95

Crystal System:

Hexagonal Space Group: P 6₃/m,P 6₃, or P 6₃22

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

By Intensity(I/I_o): 10.8(1), 3.3(0.9), 2.725(0.6),

Physical Properties of Guarinoite

Cleavage:

{001} Perfect

Color:

Pink, Deep pink.

Density:

2.8

Diaphaneity:

Transparent

Fracture:

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

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Thin - Flat dimensioned crystals.

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Streak:

light pink

Optical Properties of Guarinoite

Dichroism (e):

light pink.

Dichroism (w):

pink.

Gladstone-Dale:

CI meas= 0.083 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.13 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1912,KPDmeas= 0.2014,KC= 0.2197
Ncalc = 1.62 - 1.65

Optical Data:

Uniaxial (-), e=1.544, w=1.584, bire=0.0400.

Calculated Properties of Guarinoite

Electron Density:

Bulk Density (Electron Density)=2.75 gm/cc
note: Specific Gravity of Guarinoite =2.80 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Guarinoite= 22.97 barns/electron
U=PE_Guarinoite x rElectron Density= 63.11 barns/cc.

Radioactivity:

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

Guarinoite Classification

Dana Class:

31.02.04.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

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

(31.02.04)Dana Group

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

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 Guarinoite Information

References:

NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(Dana8)

See Also:

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

Guarinoite

(Zn,Co,Ni)6(SO4)(OH,Cl)10•5(H2O)
Dana No: 31.02.04.01 Strunz No: 07.DD.80
Locality:

Notes:

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