Schieffelinite
A valid IMA mineral species
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About Schieffelinite
Ed Schieffelin
Formula:
Pb10Te6+6O20(OH)14(SO4)(H2O)5
Colour:
Colorless, milk-white
Lustre:
Adamantine
Hardness:
2
Specific Gravity:
4.98
Crystal System:
Orthorhombic
Name:
Named after Ed Schieffelin (1847-1897), the prospector who discovered the Tombstone mining district.
Isostructural with:
A chromate-analogue of schieffelinite is mentioned in Marty et al. (2010), and was later approved as chromschieffelinite. Chemically somewhat resembles adanite, northstarite, and eztlite.
Unique Identifiers
Mindat ID:
3566
Long-form identifier:
mindat:1:1:3566:4
IMA Classification of Schieffelinite
Approved
IMA Formula:
Pb2+10Te6+6O20(OH)14(S6+O4)·5H2O
Approval year:
1979
First published:
1980
Classification of Schieffelinite
7.CD.55
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
Dana 7th ed.:
33.3.1.1
33.3.1.1
33 : SELENATES AND TELLURATES
3 : Compound Selenates and Tellurates
33 : SELENATES AND TELLURATES
3 : Compound Selenates and Tellurates
28.4.6
28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates
28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Sfl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Schieffelinite
Adamantine
Transparency:
Transparent, Translucent
Colour:
Colorless, milk-white
Streak:
White
Hardness:
2 on Mohs scale
Cleavage:
Very Good
Easy on {010}
Easy on {010}
Density:
4.98(12) g/cm3 (Measured) 5.15 g/cm3 (Calculated)
Optical Data of Schieffelinite
Type:
Biaxial (-)
RI values:
nα = 1.897 nβ = 1.940 nγ = 1.942
2V:
Measured: 24° , Calculated: 22°
Max. Birefringence:
δ = 0.045
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r > v extreme
Optical Extinction:
X = b; Y = c; Z = a.
Chemistry of Schieffelinite
Mindat Formula:
Pb10Te6+6O20(OH)14(SO4)(H2O)5
Element Weights:
Crystallography of Schieffelinite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Cmcm
Setting:
Cmcm
Cell Parameters:
a = 9.67 Å, b = 19.56 Å, c = 10.47 Å
Ratio:
a:b:c = 0.494 : 1 : 0.535
Unit Cell V:
1,980.35 ų (Calculated from Unit Cell)
Z:
16
Morphology:
Platy or scaly to 1mm
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018765 | Schieffelinite | Kampf A R, Mills S J, Housley R M, Rumsey M S, Spratt J (2012) Lead-tellurium oxysalts from Otto Mountain near Baker, California: VII. Chromschieffelinite, Pb10Te6O20(OH)14(CrO4)(H2O)5, the chromate analog of schieffelinite American Mineralogist 97 212-219 | 2012 | Otto Mountain near Baker, California, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.778 Å | (100) |
| 3.426 Å | (60) |
| 3.250 Å | (60 broad) |
| 3.560 Å | (50 broad) |
| 3.338 Å | (50) |
| 3.033 Å | (50) |
| 2.934 Å | (50) |
Comments:
Joe mine, Tombstone, Arizona, USA. Data are from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Schieffelinite
General Appearance of Type Material:
Clusters of intergrown colorless or milk-white scales.
Place of Conservation of Type Material:
Natural History Museum, Paris, France.
The Natural History Museum, London, England, 1980,539.
University of Arizona Mineral Museum, Tucson, Arizona, USA.
National Museum of Natural History, Washington, D.C., USA, R18474.
The Natural History Museum, London, England, 1980,539.
University of Arizona Mineral Museum, Tucson, Arizona, USA.
National Museum of Natural History, Washington, D.C., USA, R18474.
Geological Setting of Type Material:
In a shattered quartz vein.
Associated Minerals at Type Locality:
Synonyms of Schieffelinite
Other Language Names for Schieffelinite
Common Associates
Associations Based on Photo Data:
| 3 photos of Schieffelinite associated with Rodalquilarite | Fe2(TeO2OH)3(TeO3)Cl |
| 2 photos of Schieffelinite associated with 'Girdite' | H2Pb3(Te4+O3)(Te6+O6) |
| 1 photo of Schieffelinite associated with Ottoite | Pb2TeO5 |
| 1 photo of Schieffelinite associated with Chlorargyrite | AgCl |
| 1 photo of Schieffelinite associated with Cerussite | PbCO3 |
| 1 photo of Schieffelinite associated with Emmonsite | Fe3+2(TeO3)3 · 2H2O |
| 1 photo of Schieffelinite associated with Mojaveite | Cu6[Te6+O4(OH)2](OH)7Cl |
| 1 photo of Schieffelinite associated with Flaggite | Pb4Cu2+4Te6+2(SO4)2O11(OH)2(H2O) |
Related Minerals - Strunz-mindat Grouping
| 7.CD. | Argesite | (NH4)7Bi3Cl16 |
| 7.CD. | Campostriniite | (Bi3+,Na)3(NH4,K)2Na2(SO4)6 · H2O |
| 7.CD.05 | Matteuccite | NaHSO4 · H2O |
| 7.CD.10 | Mirabilite | Na2SO4 · 10H2O |
| 7.CD.15 | Lecontite | (NH4)Na(SO4) · 2H2O |
| 7.CD.20 | Hydroglauberite | Na10Ca3(SO4)8 · 6H2O |
| 7.CD.25 | Eugsterite | Na4Ca(SO4)3 · 2H2O |
| 7.CD.30 | Görgeyite | K2Ca5(SO4)6 · H2O |
| 7.CD.35 | Syngenite | K2Ca(SO4)2 · H2O |
| 7.CD.35 | Antofagastaite | Na2Ca(SO4)2 · 1.5H2O |
| 7.CD.35 | Koktaite | (NH4)2Ca(SO4)2 · H2O |
| 7.CD.40 | Gypsum | CaSO4 · 2H2O |
| 7.CD.45 | Chinleite-(Y) | NaY(SO4)2 · H2O |
| 7.CD.45 | Bassanite | Ca(SO4) · 0.5H2O |
| 7.CD.45 | Chinleite-(Nd) | NaNd(SO4)2 · H2O |
| 7.CD.45 | Chinleite-(Ce) | NaCe(SO4)2(H2O) |
| 7.CD.50 | Zircosulfate | (Zr,Ti)(SO4)2 · 4H2O |
| 7.CD.60 | Montanite | Bi2(TeO6) · nH2O |
| 7.CD.65 | Omongwaite | Na2Ca5(SO4)6 · 3H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Schieffelinite
mindat.org URL:
https://www.mindat.org/min-3566.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Schieffelinite
Reference List:
Williams, Sidney A. (1980) Schieffelinite, a new lead tellurate-sulphate from Tombstone, Arizona. Mineralogical Magazine, 43 (330) 771-773 doi:10.1180/minmag.1980.043.330.11
Fleischer, Michael, Chao, George Y., Francis, Carl A., Pabst, and Adolf (1981) New Mineral Names. American Mineralogist, 66 (1-2) 217-220
Kampf, A. R., Mills, S. J., Housley, R. M., Rumsey, M. S., Spratt, J. (2012) Lead-tellurium oxysalts from Otto Mountain near Baker, California: VII. Chromschieffelinite, Pb10Te6O20(OH)14(CrO4)(H2O)5, the chromate analog of schieffelinite. American Mineralogist, 97 (1) 212-219 doi:10.2138/am.2011.3909
Localities for Schieffelinite
Showing 10 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
China | |
| Jiuling Li et al. (2001) |
| Wang et al. (2019) | |
Russia | |
| Kasatkin et al. (2023) |
USA | |
| Rocks & Min.:57:12. |
| Thorne (n.d.) | |
| Rocks & Min.:57:16. +2 other references | |
| Anthony et al. (1995) | |
| PXRD and EDS performed by C. Emproto ... | |
| Kampf et al. (2010) |
| Kampf et al. (2010) |
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Grand Central Mine, Contention-Grand Central Mine group, Tombstone Mining District, Cochise County, Arizona, USA