Hydroredmondite
A valid IMA mineral species
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About Hydroredmondite
Formula:
[Pb8O2Zn(OH)6](S2O3)4 · 2H2O
Colour:
colorless
Lustre:
Adamantine
Hardness:
2
Specific Gravity:
5.124 (Calculated)
Crystal System:
Monoclinic
Name:
The name hydroredmondite is based on the chemical and structural similarity to redmondite, [Pb8O2Zn(OH)6](S2O3)4, but with the addition of H2O: [Pb8O2Zn(OH)6](S2O3)4·2H2O.
New structure type. Chemically somewhat comparable to beaverite-(Zn) and raygrantite.
Compare redmondite, which is somewhat chemically similar but structurally distinct. These two are the first zinc thiosulfate minerals to date.
Also compare sulfatoredmondite.
Compare redmondite, which is somewhat chemically similar but structurally distinct. These two are the first zinc thiosulfate minerals to date.
Also compare sulfatoredmondite.
Unique Identifiers
Mindat ID:
55691
Long-form identifier:
mindat:1:1:55691:2
GUID
(UUID V4):
(UUID V4):
88f88e7a-3dae-46dd-9677-06d2ca2e0ba1
IMA Classification of Hydroredmondite
Approved
Classification of Hydroredmondite
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 |
|---|---|---|
| Hrdm | 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 Hydroredmondite
Adamantine
Transparency:
Transparent
Colour:
colorless
Streak:
white
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
good on {101} and {101}
good on {101} and {101}
Fracture:
Step-Like
Density:
5.124 g/cm3 (Calculated)
Optical Data of Hydroredmondite
Type:
Biaxial (+)
RI values:
nα = 1.830(5) nβ = 1.880 nγ = 1.950
2V:
Measured: 83° (1)
Birefringence:
Max Birefringence:
δ = 0.120
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Comments:
β = 1.880(calc), γ = 1.950(calc)
Chemistry of Hydroredmondite
Mindat Formula:
[Pb8O2Zn(OH)6](S2O3)4 · 2H2O
Crystallography of Hydroredmondite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 12.5991(9) Å, b = 9.2819(4) Å, c = 12.9774(9) Å
β = 90.443(6)°
β = 90.443(6)°
Ratio:
a:b:c = 1.357 : 1 : 1.398
Unit Cell V:
1,517.58 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space group P21/n
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.05 Å | (29) |
| 6.49 Å | (100) |
| 4.83 Å | (34) |
| 3.638 Å | (46) |
| 3.017 Å | (52) |
| 2.825 Å | (40) |
| 2.794 Å | (27) |
| 2.729 Å | (32) |
Type Occurrence of Hydroredmondite
General Appearance of Type Material:
prisms, blades, and tablets up to about 1 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 76163, 76164, 76165 and 76166
Geological Setting of Type Material:
lead mine
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Hydroredmondite associated with Steverustite | Pb2+5(OH)5[Cu+(S6+O3S2-)3](H2O)2 |
| 1 photo of Hydroredmondite associated with Haywoodite | [Pb(H2O)10][Zn12(OH)20(H2O)(SO4)3] |
Related Minerals - Strunz-mindat Grouping
| 7.JA. | Redmondite | [Pb8O2Zn(OH)6](S2O3)4 |
| 7.JA. | Sulfatoredmondite | [Pb8O2Zn(OH)6](SO4)4 · 6H2O |
| 7.JA. | Cubothioplumbite | [Pb4(OH)4]Pb(S2O3)3 |
| 7.JA. | Hexathioplumbite | [Pb4OH4]Pb(S2O3)3 |
| 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. | Siligiite | [Pb(H2O)5(SO4)][Zn9(OH)18] |
| 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 Hydroredmondite
mindat.org URL:
https://www.mindat.org/min-55691.html
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References for Hydroredmondite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) CNMNC Newsletter 64. IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Mineralogical Magazine, 86 (1) 178-182 doi:10.1180/mgm.2021.93
Localities for Hydroredmondite
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. (2021) |
Redmond Mine, Waterville Lake, Haywood County, North Carolina, USA