Sulfatoredmondite
A valid IMA mineral species
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About Sulfatoredmondite
Formula:
[Pb8O2Zn(OH)6](SO4)4 · 6H2O
Colour:
colorless
Lustre:
Adamantine
Hardness:
2
Specific Gravity:
5.173 (Calculated)
Crystal System:
Monoclinic
Name:
The name sulfatoredmondite is based on the chemical and structural similarity to redmondite, [Pb8O2Zn(OH)6](S2O3)4, which is instead a thiosulfate mineral.
Chemically and structurally related to redmondite and hydroredmondite. The structure consists of Pb8O2Zn(OH)6 "bowtie" dimers hydrogen-bonded to sulfate and water.
Unique Identifiers
Mindat ID:
55760
Long-form identifier:
mindat:1:1:55760:1
Classification of Sulfatoredmondite
The redmondite-type cluster
The Pb8O2Zn(OH)6 "bowtie" dimers found in redmondite, hydroredmondite, and sulfatoredmondite.
IMA Classification of Sulfatoredmondite
Approved
IMA Formula:
[Pb2+8O2Zn2+(OH)6](S6+O4)4·6H2O
Approval year:
2021
7.JA.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
J : Thiosulfates
A : Thiosulfates of Pb
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
J : Thiosulfates
A : Thiosulfates of Pb
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 |
|---|---|---|
| Srdm | 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 Sulfatoredmondite
Adamantine
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
5.173 g/cm3 (Calculated)
Optical Data of Sulfatoredmondite
Type:
Biaxial (+)
RI values:
nα = 1.780(5) nβ = 1.850 nγ = 1.860
2V:
Measured: 40° (3)
Max. Birefringence:
δ = 0.080
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:
moderate r > v
Comments:
β = 1.850(calc), γ = 1.860(calc)
Chemistry of Sulfatoredmondite
Mindat Formula:
[Pb8O2Zn(OH)6](SO4)4 · 6H2O
Element Weights:
Crystallography of Sulfatoredmondite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 17.294(2) Å, b = 7.3668(9) Å, c = 12.727(2) Å
β = 110.622(9)°
β = 110.622(9)°
Ratio:
a:b:c = 2.348 : 1 : 1.728
Unit Cell V:
1,517.54 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
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Unit Cell | Unit Cell Packed
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CIF File Best | x | y | z | a | b | c
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Rotation
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Labels
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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) |
|---|---|---|---|---|---|---|---|
| M11978 | Sulfatoredmondite | Kampf, A.R., Smith, J.B., Hughes, J.M., Ma, C., & Emproto, C. (2023) Sulfatoredmondite Kampf, Anthony R., Smith, Jason B., Hughes, John M., Ma, Chi, Emproto, Christopher New Minerals from the Redmond Mine, North Carolina, USA: I. Redmondite, Hydroredmondite, and Sulfatoredmondite, Three Minerals Containing the Novel [Pb8O2Zn(OH)6]8+ |  | 2023 | Redmond Mine, North Carolina, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.10 Å | (100) |
| 6.23 Å | (48) |
| 5.86 Å | (46) |
| 3.115 Å | (78) |
| 2.892 Å | (63) |
| 2.779 Å | (63) |
| 2.706 Å | (47) |
| 1.827 Å | (46) |
Type Occurrence of Sulfatoredmondite
General Appearance of Type Material:
wedge-shaped crystals to about 2 mm
Place of Conservation of Type Material:
mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 76181, 76182 and 76183 (cotypes)
Geological Setting of Type Material:
lead mine
Synonyms of Sulfatoredmondite
Other Language Names for Sulfatoredmondite
Dutch:Sulfatoredmondiet
German:Sulfatoredmondit
Common Associates
Associations Based on Photo Data:
| 1 photo of Sulfatoredmondite associated with Lanarkite | Pb2(SO4)O |
| 1 photo of Sulfatoredmondite associated with Steverustite | Pb2+5(OH)5[Cu+(S6+O3S2-)3](H2O)2 |
| 1 photo of Sulfatoredmondite associated with Zincochenite | Pb4Zn(OH)6(SO4)2 |
Related Minerals - Strunz-mindat Grouping
| 7.JA. | Hayelasdiite | [Pb4O1.5(OH)2.5]2[Cu+5(S2O3)4(S2O2OH)2(H2O)] · 4H2O |
| 7.JA. | Boojumite | Pb8O4(OH)2(S2O3)3 |
| 7.JA. | Finescreekite | [Pb4(OH)4](S2O3)2 |
| 7.JA. | Boevskite | Pb4(TeO3)2(SO4)(S2O3) |
| 7.JA. | Redmondite | [Pb8O2Zn(OH)6](S2O3)4 |
| 7.JA. | Hydroredmondite | [Pb8O2Zn(OH)6](S2O3)4 · 2H2O |
| 7.JA. | Dinilawiite | [Pb4OAl(OH)6]2(S2O3)2 · (S2O3)(H2O)5 |
| 7.JA. | Cubothioplumbite | [Pb4(OH)4]Pb(S2O3)3 |
| 7.JA. | Hexathioplumbite | [Pb2+4(OH)4]Pb2+(S6+O3S2-)3 |
| 7.JA.05 | Sidpietersite | Pb2+4(S2O3)O2(OH)2 |
| 7.JA.10 | Steverustite | Pb2+5(OH)5[Cu+(S6+O3S2-)3](H2O)2 |
| 7.JA.15 | Fassinaite | Pb2(S2O3)(CO3) |
| 7.JA.20 | Northstarite | Pb6(Te4+O3)5(S6+O3S2-) |
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 Sulfatoredmondite
mindat.org URL:
https://www.mindat.org/min-55760.html
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Please feel free to link to this page.
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References for Sulfatoredmondite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 65. European Journal of Mineralogy, 34 (1) 143-148 doi:10.5194/ejm-34-143-2022
Kampf, Anthony R., Smith, Jason B., Hughes, John M., Ma, Chi, Emproto, Christopher (2023) New Minerals from the Redmond Mine, North Carolina, USA: I. Redmondite, Hydroredmondite, and Sulfatoredmondite, Three Minerals Containing the Novel [Pb8O2Zn(OH)6]8+ Structural Unit. The Canadian Journal of Mineralogy and Petrology, 61 (1). 189-202 doi:10.3749/2200059
Localities for Sulfatoredmondite
Showing 1 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.
USA (TL) | |
| Miyawaki et al. (2022) |
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Redmond Mine, Waterville Lake, Haywood County, North Carolina, USA