Zincgartrellite Mineral Data

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

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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.

Diaphaniety:

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= -0.047 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1703,KC= 0.1626

Optical Data:

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

Calculated Properties of Zincgartrellite

Electron Density:

r_electron=4.94 gm/cc
note: r_{Zincgartrellite}=5.52 gm/cc.

Fermion Index

Fermion Index = 0.07602
Boson Index = 0.92398

Photoelectric:

PE_{Zincgartrellite}= 577.36 barns/electron
U=PE_{Zincgartrellite} x r_electron=2,851.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zincgartrellite is Not Radioactive

Zincgartrellite Classification

Dana Class:

43.2.2.2 (43)Compound Phosphates, etc.

(43.2)(Anhydrous Normal Compound Anions)

(43.2.2)Dana Group

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

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

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

Strunz Class:

VII/C.31-92 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.31 - Mawbyite - Gartrellite series

VII/C.31-02 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-04 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-05 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-06 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m

VII/C.31-08 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-10 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-20 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

VII/C.31-30 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-35 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-36 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-40 Thometzekite Pb(Cu,Zn)2(AsO4)2·2(H2O) C 2/m 2/m

VII/C.31-50 Tsumcorite PbZnFe(AsO4)2·(H2O) C 2/m 2/m

VII/C.31-74 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

VII/C.31-78 Lukrahnite! Ca(Cu,Zn)(Fe,Zn)(AsO4)2(OH,H2O)2 P1 1

VII/C.31-80 Phosphogartrellite! PbCuFe(PO4)2(OH,H2O)2 P1 1

VII/C.31-90 Gartrellite Pb(Cu,Fe)2(AsO4,SO4)2(CO3,H2O)0.7 P1,P 1 Tri

VII/C.31-92 Zincgartrellite Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2 P1 1

VII/C.31-98 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2·2(H2O) P1 1

VII/C.31-100 Helmutwinklerite PbZn2(AsO4)2·2(H2O) 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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Zincgartrellite

Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2
Dana No: 43.2.2.2 Strunz No: VII/C.31-92
Locality:

Notes: