Gartrellite Mineral Data

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General Gartrellite Information

Chemical Formula:

Pb(Cu,Fe++)2(AsO4,SO4)2(CO3,H2O)0.7

Composition:

Molecular Weight = 620.46 gm

Iron 4.50 % Fe 5.79 % FeO

Copper 15.36 % Cu 19.23 % CuO

Arsenic 18.11 % As 27.78 % As₂O₅

Hydrogen 0.06 % H 0.58 % H₂O

Lead 33.39 % Pb 35.97 % PbO

Carbon 0.97 % C 3.55 % CO₂

Sulfur 2.58 % S 6.45 % SO₃

Oxygen 25.01 % O

______ ______

100.00 % 99.36 % = TOTAL OXIDE

Empirical Formula:

PbCu_1.5Fe²⁺_0.5(AsO₄)_1.5(SO₄)_0.5(CO₃)_0.5(H₂O)_0.2

IMA Status:

Approved IMA 1989

Locality:

Ashburton Downs, Western Australia. Link to MinDat.org Location Data.

Name Origin:

Named for Blair Gartrell (1950-1995), Australian collector who found the mineral.

Name Pronunciation:

Gartrellite + Pronunciation

Synonym:

ICSD 76618

PDF 46-1306

Gartrellite Image

Images:

Gartrellite

Comments: Lime green gartrellite on matrix associated with mimetite. Former Martín Oliete Fontela collection.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: 6x4x3 cm.
© Fabre Minerals

Gartrellite Crystallography

Axial Ratios:

a:b:c =0.9658:1:1.3424

Cell Dimensions:

a = 5.46, b = 5.653, c = 7.589, Z = 1; alpha = 67.68°, beta = 69.27°, gamma = 70.04° V = 190.49 Den(Calc)= 5.41

Crystal System:

TriclinicSpace Group: P1,P 1

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

By Intensity(I/I_o): 2.948(1), 2.899(0.81), 2.503(0.66),

Crystal Structure:

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Help on Above

Krause W , Belendorff K , Bernhardt H J , McCammon C A , Effenberger H , Mikenda W , European Journal of Mineralogy , 10 (1998) p.179-206, Crystal chemistry of the tsumcorite-group minerals. New data on ferrilotharmeyerite,, tsumcorite, thometzekite, mounanaite, helmutwinklerite, and a redefinition of gartrellite

Physical Properties of Gartrellite

Color:

Greenish yellow, Yellow.

Diaphaneity:

Transparent

Fracture:

Friable - The crumbly disintegration of earthy materials or highly fractured minerals.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Earthy (Dull)

Streak:

yellow

Optical Properties of Gartrellite

Gladstone-Dale:

CI calc= -0.205 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1896,KC= 0.1573
Ncalc = 1.82

Optical Data:

Biaxial (+), a=1.94, b=1.98, g=2.06, bire=0.1200, 2V(Calc)=74, 2V(Meas)=78.

Calculated Properties of Gartrellite

Electron Density:

Bulk Density (Electron Density)=4.68 gm/cc
note: Specific Gravity of Gartrellite =5.24 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Gartrellite= 596.16 barns/electron
U=PE_Gartrellite x rElectron Density=2,789.29 barns/cc.

Radioactivity:

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

Gartrellite Classification

Dana Class:

43.02.02.01 (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 Gartrellite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.75,p932,1990) OPTIC PROP.(Am.Min.,Vol.75,p932,1990)

See Also:

Links to other databases for Gartrellite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Gartrellite

Pb(Cu,Fe++)2(AsO4,SO4)2(CO3,H2O)0.7
Dana No: 43.02.02.01 Strunz No: 08.CG.20
Locality:

Notes: