Schieffelinite Mineral Data

General Schieffelinite Information

Chemical Formula:

Pb(Te++++++,S)O4•(H2O)

Composition:

Molecular Weight = 392.93 gm

Tellurium 24.36 % Te 30.46 % TeO₂

Hydrogen 0.51 % H 4.58 % H₂O

Lead 52.73 % Pb 56.80 % PbO

Sulfur 2.04 % S 5.09 % SO₃

Oxygen 20.36 % O

______ ______

100.00 % 96.95 % = TOTAL OXIDE

Empirical Formula:

PbTe_0.75S_0.25O₄•(H₂O)

Environment:

Secondary mineral found in the oxidized portions of telluide-bearing minerals.

IMA Status:

Approved IMA 1980

Locality:

Joe and Grand Central mines, Tombstone, Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Ed Schieffelin (1847-1897), stagecoach driver and prospector who discovered the Tombstone district mines.

Name Pronunciation:

Schieffelinite + Pronunciation

Schieffelinite Image

Images:

Schieffelinite Rodalquilarite

Comments: Creamy white Schieffelinite with minor green rodalquilarite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Schieffelinite Crystallography

Axial Ratios:

a:b:c =0.4943:1:0.5352

Cell Dimensions:

a = 9.67, b = 19.56, c = 10.47, Z = 16; V = 1,980.35 Den(Calc)= 5.27

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mcm

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

By Intensity(I/I_o): 9.778(1), 3.25(0.6), 3.426(0.6),

Physical Properties of Schieffelinite

Cleavage:

{010} Good

Color:

Colorless, White.

Density:

4.98

Diaphaneity:

Transparent

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Scaly - Morphology like fish scales.

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Adamantine

Streak:

white

Optical Properties of Schieffelinite

Gladstone-Dale:

CI meas= -0.153 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1758,KPDmeas= 0.186,KC= 0.1614
Ncalc = 1.8 - 1.85

Optical Data:

Biaxial (-), a=1.897, b=1.94, g=1.942, bire=0.0450, 2V(Calc)=22, 2V(Meas)=24. Dispersion r < v marked.

Calculated Properties of Schieffelinite

Electron Density:

Bulk Density (Electron Density)=4.48 gm/cc
note: Specific Gravity of Schieffelinite =5.27 gm/cc.

Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Photoelectric:

PE_{Schieffelinite}=1,040.40 barns/electron
U=PE_{Schieffelinite} x rElectron Density=4,660.63 barns/cc.

Radioactivity:

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

Schieffelinite Classification

Dana Class:

33.03.01.01 (33)Selenates and Tellurates

(33.03)with other anion groups

(33.03.01)Dana Group

33.03.01.01 Schieffelinite Pb(Te,S)O4•(H2O) C mcm 2/m 2/m 2/m

Strunz Class:

07.CD.55 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CD -With only large cations

07.CD.55 Schieffelinite Pb(Te,S)O4•(H2O) C mcm 2/m 2/m 2/m

Other Schieffelinite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Schieffelinite :
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

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Schieffelinite

Pb(Te++++++,S)O4•(H2O)
Dana No: 33.03.01.01 Strunz No: 07.CD.55
Locality:

Notes:

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