Zincgartrellite Mineral Data

General Zincgartrellite Information

Chemical Formula:

Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2

Composition:

Molecular Weight = 644.39 gm

Zinc 9.13 % Zn 11.37 % ZnO

Iron 5.20 % Fe 6.69 % FeO

Copper 4.93 % Cu 5.55 % Cu₂O

Arsenic 23.25 % As 35.67 % As₂O₅

Hydrogen 0.50 % H 4.47 % H₂O

Lead 32.15 % Pb 34.64 % PbO

Oxygen 24.83 % O

______ ______

100.00 % 98.39 % = TOTAL OXIDE

Empirical Formula:

PbZn_0.9Fe²⁺_0.6Cu_0.5(AsO₄)₂(OH)_0.8(H₂O)_1.2

Environment:

Associated with wulfenite and duftite on massive chalcocite.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Tsumeb mine, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named as the Zn-dominant analogue of gartrellite

Synonym:

IMA1998-014

Zincgartrellite Image

Images:

Zincgartrellite

Comments: Small yellow-green zincgartrellite crystals on chalcocite.
Location: Tsumeb, Namibia. Scale: Specimen Size 3x7 mm.
© Diederik Visser

Zincgartrellite Crystallography

Axial Ratios:

a:b:c =0.9875:1:1.356

Cell Dimensions:

a = 5.55, b = 5.62, c = 7.621, Z = 1; alpha = 68.59°, beta = 69.17°, gamma = 69.51° V = 193.75 Den(Calc)= 5.52

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.999(1)(111), 3.252(0.91)(102), 3.283(0.89)(012),4.669(0.86)(101), 2.894(0.74)(111), 4.731(0.74)(011), 2.88(0.7)(111),

Crystal Structure:

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Effenberger H , Krause W , Bernhardt H J , Martin M , Mineralogical Magazine , 64 (2000) p.1109-1126, On the symmetry of tsumcorite group minerals, based on the new species rappoldite and zincgartrellite, Locality: Tsumeb, Namibia

Physical Properties of Zincgartrellite

Cleavage:

None

Color:

Greenish yellow.

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

yellow

Optical Properties of Zincgartrellite

Gladstone-Dale:

CI calc= -0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1757,KC= 0.1626
Ncalc = 1.87

Optical Data:

Biaxial (-), a=1.91, b=1.94, g=1.97, bire=0.0600

Calculated Properties of Zincgartrellite

Electron Density:

Bulk Density (Electron Density)=4.79 gm/cc
note: Specific Gravity of Zincgartrellite =5.35 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_{Zincgartrellite}= 577.36 barns/electron
U=PE_{Zincgartrellite} x rElectron Density=2,763.91 barns/cc.

Radioactivity:

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

Zincgartrellite Classification

Dana Class:

43.02.02.02 (43)Compound Phosphates, etc.

(43.02)(Anhydrous Normal Compound Anions)

(43.02.02)Gartrellite Group

43.02.02.01 Gartrellite Pb(Cu,Fe)2(AsO4,SO4)2(CO3,H2O)0.7 P1,P 1 Tri

43.02.02.02 Zincgartrellite! Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2 P1 1

43.02.02.03 Lukrahnite! Ca(Cu,Zn)(Fe,Zn)(AsO4)2(OH,H2O)2 P1 1

Strunz Class:

08.CG.20 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CG -With large and medium-sized cations, RO4:H2O = 1:1

08.CG.20 Gartrellite Pb(Cu,Fe)2(AsO4,SO4)2(CO3,H2O)0.7 P1,P 1 Tri

08.CG.20 Helmutwinklerite PbZn2(AsO4)2•2(H2O) P1 1

08.CG.20 Phosphogartrellite! PbCuFe(PO4)2(OH,H2O)2 P1 1

08.CG.20 Zincgartrellite! Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2 P1 1

08.CG.20 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2•2(H2O) P1 1

08.CG.20 Lukrahnite! Ca(Cu,Zn)(Fe,Zn)(AsO4)2(OH,H2O)2 P1 1

Other Zincgartrellite Information

References:

NAME( AmMin, v 86, p 940) PHYS. PROP.(AmMin, v 86, p 940) OPTIC PROP.(AmMin, v 86, p 940)

See Also:

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

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Print or Cut-and-Paste your Zincgartrellite Specimen Label here :

Zincgartrellite

Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2
Dana No: 43.02.02.02 Strunz No: 08.CG.20
Locality:

Notes: