Vyalsovite
A valid IMA mineral species
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About Vyalsovite
Formula:
FeCaAlS(OH)5
Colour:
Carmine-red
Lustre:
Metallic
Crystal System:
Orthorhombic
Name:
Named after Leonid Nikolaevich Vyalsov (Леонид Николаевич Вяльсов) (b. 1939), a specialist in reflected-light optics at IGEM, Moscow. He studied the unusual optical properties of this mineral.
The optic sign of vyalsovite changes four times within the range of reflectivity measurements..
Unique Identifiers
Mindat ID:
4219
Long-form identifier:
mindat:1:1:4219:8
GUID
(UUID V4):
(UUID V4):
eb57fb2e-3c87-4117-af41-cbb4ae25c758
IMA Classification of Vyalsovite
Approved
IMA Formula:
CaFeAlS(OH)5
Approval year:
1989
First published:
1992
Classification of Vyalsovite
2.FD.45
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
D : With O, OH, H2O
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
D : With O, OH, H2O
2.14.4.1
2 : SULFIDES
14 : Hydroxysulfides and Hydrated Sulfides
2 : SULFIDES
14 : Hydroxysulfides and Hydrated Sulfides
4.6
4 : Oxysulphides
4 : Oxysulphides
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 |
|---|---|---|
| Vyl | 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 Vyalsovite
Optical Data of Vyalsovite
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 250nm | 10.1% | 7.7% |
| 260nm | 10.1% | 6.8% |
| 270nm | 9.9% | 6.0% |
| 280nm | 9.8% | 5.8% |
| 290nm | 9.7% | 5.9% |
| 300nm | 9.6% | 6.5% |
| 310nm | 9.5% | 7.4% |
| 320nm | 9.4% | 8.0% |
| 330nm | 9.2% | 8.0% |
| 340nm | 9.0% | 7.6% |
| 350nm | 9.0% | 7.2% |
| 360nm | 9.0% | 6.8% |
| 370nm | 8.8% | 6.5% |
| 380nm | 8.8% | 6.5% |
| 390nm | 8.6% | 6.9% |
| 400nm | 8.5% | 8.0% |
| 410nm | 8.4% | 9.8% |
| 420nm | 8.2% | 11.5% |
| 430nm | 8.2% | 12.0% |
| 440nm | 8.1% | 11.6% |
| 450nm | 8.1% | 10.2% |
| 460nm | 8.1% | 8.9% |
| 470nm | 8.1% | 7.7% |
| 480nm | 8.2% | 6.8% |
| 490nm | 8.3% | 6.9% |
| 500nm | 8.3% | 7.8% |
| 510nm | 8.3% | 9.3% |
| 520nm | 8.2% | 10.8% |
| 530nm | 8.2% | 11.6% |
| 540nm | 8.2% | 11.4% |
| 550nm | 8.1% | 10.5% |
| 560nm | 8.0% | 9.2% |
| 570nm | 8.0% | 8.3% |
| 580nm | 8.0% | 8.2% |
| 590nm | 8.0% | 9.1% |
| 600nm | 7.9% | 11.2% |
| 610nm | 7.9% | 15.1% |
| 620nm | 7.9% | 20.0% |
| 630nm | 7.9% | 25.0% |
| 640nm | 7.9% | 29.0% |
| 650nm | 7.9% | 29.1% |
| 660nm | 7.8% | 27.9% |
| 670nm | 7.8% | 26.6% |
| 680nm | 7.8% | 25.8% |
| 690nm | 7.8% | 25.3% |
| 700nm | 7.8% | 24.7% |
| 710nm | 7.8% | 23.7% |
| 720nm | 7.8% | 22.7% |
| 730nm | 7.8% | 21.7% |
| 740nm | 7.8% | 20.7% |
| 750nm | 7.8% | 19.9% |
| 760nm | 7.8% | 19.2% |
| 770nm | 7.8% | 18.7% |
| 780nm | 7.8% | 18.2% |
| 790nm | 7.8% | 17.9% |
| 800nm | 7.8% | 17.5% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 29.1%.
R1 shown in black, R2 shown in red
Comments:
In isotropic (Ro) and nearly isotropic sections, vyalsovite is dark gray; Ro corresponds to the minimum reflectance. In sections parallel to the optic axis, and thus showing Ro and Re, the mineral has extreme bireflectance and reflection pleochroism (dark
Chemistry of Vyalsovite
Mindat Formula:
FeCaAlS(OH)5
Crystallography of Vyalsovite
Crystal System:
Orthorhombic
Cell Parameters:
a = 14.20(1) Å, b = 20.98(2) Å, c = 5.496(4) Å
Ratio:
a:b:c = 0.677 : 1 : 0.262
Unit Cell V:
1,637.35 ų (Calculated from Unit Cell)
Z:
8
Comment:
space groups: Cmmm, C222, Cmm2, Cm2m, Cmma, C2ma.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.40 Å | (100) |
| 4.76 Å | (40) |
| 2.88 Å | (20) |
| 2.58 Å | (20) |
| 2.48 Å | (20) |
| 2.29 Å | (20) |
| 2.24 Å | (20) |
| 2.16 Å | (50) |
| 1.973 Å | (30) |
| 1.894 Å | (30) |
| 1.846 Å | (30) |
| 1.676 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Vyalsovite
General Appearance of Type Material:
5- to 150-µm grains and veinlets.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Mineragraphy Laboratory of IGEM, Academy of Sciences, Moscow, Russia.
Mineragraphy Laboratory of IGEM, Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
In forsterite skarn at the contact of a gabbro-dolerite intrusion in dolomite.
Associated Minerals at Type Locality:
Reference:
Evstigneeva, T.L., Genkin, A.D., Sandomirskaya, S.M., Trubkin, N.V. (1992) Vyalsovite, a new sulfide-hydroxide of iron, calcium, and aluminum. American Mineralogist: 77: 201-206.
Synonyms of Vyalsovite
Other Language Names for Vyalsovite
German:Vyalsovit
Spanish:Vyalsovita
Common Associates
Associated Minerals Based on Photo Data:
| 6 photos of Vyalsovite associated with Valleriite | (Fe2+,Cu)4(Mg,Al)3S4(OH,O)6 |
| 6 photos of Vyalsovite associated with Chalcopyrite | CuFeS2 |
| 5 photos of Vyalsovite associated with Magnetite | Fe2+Fe3+2O4 |
| 2 photos of Vyalsovite associated with Forsterite | Mg2SiO4 |
| 2 photos of Vyalsovite associated with Pentlandite | (NixFey)Σ9S8 |
| 2 photos of Vyalsovite associated with Spinel | MgAl2O4 |
| 1 photo of Vyalsovite associated with Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
Related Minerals - Strunz-mindat Grouping
| 2.FD. | Ferrovalleriite | 2(Fe,Cu)S · 1.5Fe(OH)2 |
| 2.FD.05 | Kermesite | Sb2S2O |
| 2.FD.10 | Viaeneite | (Fe,Pb)4S8O |
| 2.FD.20 | Erdite | NaFeS2 · 2H2O |
| 2.FD.25 | Coyoteite | NaFe3S5 · 2H2O |
| 2.FD.30 | Haapalaite | (Fe2+,Ni)2(Mg,Fe2+)1.61S2(OH)3.22 |
| 2.FD.30 | Valleriite | (Fe2+,Cu)4(Mg,Al)3S4(OH,O)6 |
| 2.FD.30 | Yushkinite | (Mg,Al)V4+S2(OH)2 |
| 2.FD.30 | Ekplexite | (Nb,Mo,W)S2 · (Mg1-xAlx)(OH)2+x |
| 2.FD.35 | Tochilinite | Fe2+5-6(Mg,Fe2+)5S6(OH)10 |
| 2.FD.35 | Ferrotochilinite | Fe2+6(Fe2+,Mg)5S6(OH)10 |
| 2.FD.35 | Kaskasite | (Mo,Nb)S2 · (Mg1-xAlx)(OH)2+x |
| 2.FD.35 | Manganokaskasite | (Mo,Nb)S2 · (Mn1-xAlx)(OH)2+x |
| 2.FD.40 | Wilhelmramsayite | Cu3FeS3 · 2H2O |
| 2.FD.50 | Bazhenovite | Ca8S2(S3)(S2O3)(OH)12 · 20H2O |
| 2.FD.55 | UM2004-56-OS:BiCuPb | PbCu4Bi4S2(O,OH,H2O)16 (?) |
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 Vyalsovite
mindat.org URL:
https://www.mindat.org/min-4219.html
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References for Vyalsovite
Reference List:
Localities for Vyalsovite
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.
Russia | |
| |
| Amer.Mineral. (1992) +1 other reference |
Quick NavTopAbout VyalsoviteUnique 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
Komsomol'skii Mine, Talnakh Cu-Ni Deposit, Noril'sk, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia