Miassite
A valid IMA mineral species
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About Miassite
Formula:
Rh17S15
Lustre:
Metallic
Hardness:
5 - 6
Specific Gravity:
7.42 (Calculated)
Crystal System:
Isometric
Name:
After the type locality.
Type Locality:
Unique Identifiers
Mindat ID:
7250
Long-form identifier:
mindat:1:1:7250:8
GUID
(UUID V4):
(UUID V4):
8c879fda-a5d2-40b5-ac82-be793a90e46a
IMA Classification of Miassite
Approved
Approval year:
1997
Classification of Miassite
2.BC.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
C : With Rh, Pd, Pt, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
C : With Rh, Pd, Pt, etc.
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 |
|---|---|---|
| Mia | 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 Miassite
Metallic
Transparency:
Opaque
Hardness:
5 - 6 on Mohs scale
Hardness:
VHN10=724 - 736 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Density:
7.42 g/cm3 (Calculated)
Optical Data of Miassite
Type:
Isotropic
Colour in reflected light:
Light gray with a bluish tint
Internal Reflections:
none
Chemistry of Miassite
Mindat Formula:
Rh17S15
Elements listed:
Crystallography of Miassite
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Pm3n
Setting:
Pm3n
Cell Parameters:
a = 10.024(5) Å
Unit Cell V:
1,007.22 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space group probable
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 1.774 Å | (100) |
| 3.02 Å | (90) |
| 2.24 Å | (90) |
| 1.931 Å | (80) |
| 3.17 Å | (70) |
| 2.68 Å | (50) |
| 3.33 Å | (20) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 12 : Hadean hydrothermal subsurface sulfide deposits (see also #33) | |
| Near-surface Processes | |
| 26 : Hadean detrital minerals | |
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Miassite
General Appearance of Type Material:
rounded inclusions to 100 µm.
Place of Conservation of Type Material:
Mining Museum, Saint Petersburg Mining Institute, Russia (3073/2).
Geological Setting of Type Material:
fluvial placer deposits derived from ophiolites or layered mafic intrusions
Associated Minerals at Type Locality:
Reference:
Britvin S N, Rudashevsky N S, Bogdanova A N, Shcherbachev D K (2001) Miassite Rh17S15, a new mineral from a placier of Miass River, Urals. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 130, issue 2, 41-45
Synonyms of Miassite
Other Language Names for Miassite
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Miassite associated with Bowieite | Rh2S3 |
| 1 photo of Miassite associated with Isoferroplatinum | Pt3Fe |
Related Minerals - Strunz-mindat Grouping
| 2.BC. | UM2004-45-Se:AgHgPd | (Ag,Cu)6Hg2Pd2Se3 |
| 2.BC. | Fleetite | Cu2RhIrSb2 |
| 2.BC. | Coldwellite | Pd3Ag2S |
| 2.BC. | Panskyite | Pd9Ag2Pb2S4 |
| 2.BC.05 | Palladseite | Pd17Se15 |
| 2.BC.05 | UM2000-47-S:CuFePdPt | PtPd(Fe,Cu)S |
| 2.BC.10 | Oosterboschite | (Pd,Cu)7Se5 |
| 2.BC.15 | Chrisstanleyite | Ag2Pd3Se4 |
| 2.BC.15 | Jagüéite | Cu2Pd3Se4 |
| 2.BC.20 | Keithconnite | Pd20Te7 |
| 2.BC.25 | Vasilite | (Pd,Cu)16(S,Te)7 |
| 2.BC.30 | Telluropalladinite | Pd9Te4 |
| 2.BC.35 | Luberoite | Pt5Se4 |
| 2.BC.35 | Kojonenite | Pd7-xSnTe2 (0.3 ≤ x ≤ 0.8) |
| 2.BC.37 | Kravtsovite | PdAg2S |
| 2.BC.40 | Oulankaite | (Pd,Pt)5(Cu,Fe)4SnTe2S2 |
| 2.BC.40 | Lukkulaisvaaraite | Pd14Ag2Te9 |
| 2.BC.42 | Monchetundraite | Pd2NiTe2 |
| 2.BC.45 | Telargpalite | (Pd,Ag)3(Te,Bi) |
| 2.BC.45 | Thalhammerite | Pd9Ag2Bi2S4 |
| 2.BC.47 | Vymazalováite | Pd3Bi2S2 |
| 2.BC.50 | Temagamite | Pd3HgTe3 |
| 2.BC.55 | Sopcheite | Ag4Pd3Te4 |
| 2.BC.55 | Bowlesite | PtSnS |
| 2.BC.60 | Laflammeite | Pd3Pb2S2 |
| 2.BC.65 | Tischendorfite | Pd8Hg3Se9 |
Other Information
Electrical:
Solid state chemistry has produced a plethora of materials with properties not found in nature. For example, high-temperature superconductivity in cuprates is drastically different from the superconductivity of naturally occurring metals and alloys and is frequently referred to as unconventional. Unconventional superconductivity is also found in other synthetic compounds, such as iron-based and heavy-fermion superconductors. Here, we report compelling evidence of unconventional nodal superconductivity in synthetic samples of Rh17S15 (Tc = 5.4 K), which is also found in nature as the mineral miassite. We investigated the temperature-dependent variation of the London penetration depth Δλ(T) and the disorder evolution of the critical superconducting temperature Tc and the upper critical field Hc2(T) in single crystalline Rh17S15. We found a T − linear temperature variation of Δλ(T) below 0.3Tc, which is consistent with the presence of nodal lines in the superconducting gap of Rh17S15. The nodal character of the superconducting state is supported by the observed suppression of Tc and Hc2(T) in samples with a controlled level of non-magnetic disorder introduced by 2.5 MeV electron irradiation. We propose a nodal sign-changing superconducting gap in the A1g irreducible representation, which preserves the cubic symmetry of the crystal and is in excellent agreement with the derived superfluid density. To the best of our knowledge, this establishes miassite as the only mineral known so far that reveals unconventional superconductivity in its clean synthetic form, though it is unlikely that it is present in natural crystals because of unavoidable impurities that quickly destroy nodal superconductivity.
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 Miassite
mindat.org URL:
https://www.mindat.org/min-7250.html
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References for Miassite
Reference List:
Britvin, S. N., Rudashevsky, N. S., Bogdanova, A. N., Shcherbachev, D. K. (2001) Miassite Rh17S15, a new mineral from a placier of Miass River, Urals. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 130 (2) 41-45
[1]Kim, Hyunsoo, Tanatar, Makariy A., Kończykowski, Marcin, Grasset, Romain, Kaluarachchi, Udhara S., Teknowijoyo, Serafim, Cho, Kyuil, Sapkota, Aashish, Wilde, John M., Krogstad, Matthew J., Bud’ko, Sergey L., Brydon, Philip M. R., Canfield, Paul C., Prozorov, Ruslan (2024) Nodal superconductivity in miassite Rh17S15. Communications Materials, 5 (1) 17 doi:10.1038/s43246-024-00456-w
Localities for Miassite
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.
Canada | |
| gsa.confex.com (n.d.) |
| Fedortchouk et al. (2010) |
France | |
| Augé (1988) +1 other reference |
Japan | |
| NISHIO–HAMANE et al. (2019) |
Russia (TL) | |
| Britvin et al. (2001) |
| Zaykov et al. (2017) | |
| Airiyants et al. (2014) |
| |
Sierra Leone | |
| Mineralogy and Petrology 68:75-84 (2000) |
South Africa | |
| ... | |
| Melcher et al. (2005) |
| Oberthür et al. (2021) |
USA | |
| USGS Open-File Report 01-269 |
| Belkin et al. (2021) |
Quick NavTopAbout MiassiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Miass River, Chelyabinsk Oblast, Russia