Mineralogy Database

Schieffelinite Mineral Data

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General Schieffelinite Information

Help on Chemical  Formula: Chemical Formula: Pb(Te++++++,S)O4•(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: PbTe0.75S0.25O4•(H2O)
Help on Environment: Environment: Secondary mineral found in the oxidized portions of telluide-bearing minerals.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Joe and Grand Central mines, Tombstone, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ed Schieffelin (1847-1897), stagecoach driver and prospector who discovered the Tombstone district mines.
Help on Name Pronunciation: Name Pronunciation: Schieffelinite + Pronunciation Say SCHIEFFELINITE

Schieffelinite Image

Click Here for Larger   Image in a New Browser Window Images:
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  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

Help on Axial Ratios: Axial Ratios: a:b:c =0.4943:1:0.5352
Help on Cell Dimensions: Cell Dimensions: a = 9.67, b = 19.56, c = 10.47, Z = 16; V = 1,980.35 Den(Calc)= 5.27
Help on Crystal System: 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/Io): 9.778(1), 3.25(0.6), 3.426(0.6),

Physical Properties of Schieffelinite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 4.98
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Schieffelinite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.48 gm/cc
note: Specific Gravity of Schieffelinite =5.27 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PESchieffelinite =1,040.40 barns/electron
U=PESchieffelinite x rElectron Density=4,660.63 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schieffelinite is Not Radioactive

Schieffelinite Classification

Help on  Dana Class: Dana Class: (33)Selenates and Tellurates
  (33.03)with other anion groups
  (33.03.01)Dana Group Schieffelinite Pb(Te,S)O4•(H2O) C mcm 2/m 2/m 2/m
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 07.CD.55





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