Queitite Mineral Data

Queitite Mineral Data +

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)

IMA Status:

Approved IMA 1979

Locality:

Link to MinDat.org Location Data.

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),

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

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:

r_electron=5.22 gm/cc
note: r_Queitite=6.07 gm/cc.

Fermion Index

Fermion Index = 0.14652
Boson Index = 0.85348

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Queitite is Not Radioactive

Queitite Classification

Dana Class:

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

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

(58.1.3)Dana Group

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

Strunz Class:

VIII/C.27-20 VIII - Silicates

VIII/C - Sorosilicates, mixed structure with [SiO4]2- "inseln" and [Si2O7]6- groups

VIII/C.27 - Ganomalite - Queitite series

VIII/C.27-10 Ganomalite Pb9Ca5MnSi9O33 P 3 3

VIII/C.27-20 Queitite Pb4Zn2(SiO4)(Si2O7)(SO4) P 2₁ 2

Other Queitite Information

References:

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

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

Queitite

Pb4Zn2(SiO4)(Si2O7)(SO4)
Dana No: 58.1.3.1 Strunz No: VIII/C.27-20
Locality:

Notes: