Queitite Mineral Data

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General Queitite Information

Chemical Formula:

Pb4Zn2(SiO4)(Si2O7)(SO4)

Composition:

Molecular Weight = 1,315.89 gm

Zinc 9.94 % Zn 12.37 % ZnO

Silicon 6.40 % Si 13.70 % SiO₂

Lead 62.98 % Pb 67.85 % PbO

Sulfur 2.44 % S 6.08 % SO₃

Oxygen 18.24 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₄Zn₂(SiO₄)(Si₂O₇)(SO₄)

Environment:

On corroded sulfides in a partially oxidized lead ore from a dolostone-hosted hydrothermal polymetallic ore deposit.

IMA Status:

Approved IMA 1979

Locality:

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

Name Origin:

Named for Clive Sedric Queit, mineral dealer of Tsumeb, Namibia.

Name Pronunciation:

Queitite

Synonym:

ICSD 100296

PDF 33-782

Queitite Image

Images:

Queitite

Comments: White earthy queitite masses on quartz.
Location: Tombstone, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Queitite Crystallography

Axial Ratios:

a:b:c =2.1576:1:2.4025

Cell Dimensions:

a = 11.362, b = 5.266, c = 12.652, Z = 2; beta = 108.16° V = 719.29 Den(Calc)= 6.08

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 2₁

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

By Intensity(I/I_o): 3.18(1), 1.635(0.8), 1.49(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Hess H , Keller P , Zeitschrift fur Kristallographie , 151 (1980) p.287-299, Die kristallstruktur von queitit, Pb4Zn2[SO4|SiO4|Si2O7], Locality: Tsumeb mine, Namibia

Physical Properties of Queitite

Cleavage:

{010} Indistinct, {001} Indistinct

Color:

Colorless, White, Light yellow.

Density:

6.07

Hardness:

4 - Fluorite

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Queitite

Gladstone-Dale:

CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1482,KPDmeas= 0.1484,KC= 0.149
Ncalc = 1.9 - 1.91

Optical Data:

Biaxial (+), a=1.899, b=1.901, g=1.903, bire=0.0040, 2V(Calc)=88, 2V(Meas)=90.

Calculated Properties of Queitite

Electron Density:

Bulk Density (Electron Density)=5.22 gm/cc
note: Specific Gravity of Queitite =6.07 gm/cc.

Fermion Index:

Fermion Index = 0.14
Boson Index = 0.86

Photoelectric:

PE_Queitite=1,129.90 barns/electron
U=PE_Queitite x rElectron Density=5,900.04 barns/cc.

Radioactivity:

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

Queitite Classification

Dana Class:

58.01.03.01 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.01)with cations in [4] and higher coordination; single and double groups (n=1,2)

(58.01.03)Dana Group

58.01.03.01 Queitite Pb4Zn2(SiO4)(Si2O7)(SO4) P 2₁ 2

Strunz Class:

09.BF.20 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BF -Sorosilicates with mixed SiO4 and Si2O7 groups;

09.BF.20 Queitite Pb4Zn2(SiO4)(Si2O7)(SO4) P 2₁ 2

Other Queitite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Queitite :
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
15 - WWW-MINCRYST

Search for Queitite using:

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Ask about Queitite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Queitite

Pb4Zn2(SiO4)(Si2O7)(SO4)
Dana No: 58.01.03.01 Strunz No: 09.BF.20
Locality:

Notes: