Svyazhinite
A valid IMA mineral species
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About Svyazhinite
Formula:
(Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2O
Colour:
Colourless (crystals), yellowish pink
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
1.67
Crystal System:
Triclinic
Member of:
Name:
Named after Nikolai Vasil'evich Svyazhin (1927-1967), Russian mineralogist, Ural Mining Institute, Sverdlovsk, Russia.
Unique Identifiers
Mindat ID:
3841
Long-form identifier:
mindat:1:1:3841:2
Similar Names
| Zvyaginite | A valid IMA mineral species | NaZnNb2Ti[Si2O7]2(OH,F)3(H2O)4+x (x < 1) |
IMA Classification of Svyazhinite
Approved
IMA Formula:
MgAl(S6+O4)2F·14H2O
Approval year:
1983
Classification of Svyazhinite
7.DB.05
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
B : With only medium-sized cations; insular octahedra and finite units
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
B : With only medium-sized cations; insular octahedra and finite units
31.9.8.2
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
26.11
26 : Sulphates with Halide
26 : Sulphates with Halide
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 |
|---|---|---|
| Svz | 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 Svyazhinite
Vitreous
Transparency:
Translucent
Colour:
Colourless (crystals), yellowish pink
Streak:
White
Hardness:
2 - 3 on Mohs scale
Cleavage:
Imperfect/Fair
{010}
{010}
Density:
1.67 g/cm3 (Measured) 1.69 g/cm3 (Calculated)
Optical Data of Svyazhinite
Type:
Biaxial (-)
RI values:
nα = 1.423(2) nβ = 1.439(2) nγ = 1.444(2)
2V:
Calculated: 56°
Max. Birefringence:
δ = 0.021
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.
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.
Surface Relief:
Moderate
Dispersion:
relatively strong
Chemistry of Svyazhinite
Mindat Formula:
(Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2O
Element Weights:
Common Impurities:
Ca
Crystallography of Svyazhinite
Crystal System:
Triclinic
Cell Parameters:
a = 6.217 Å, b = 13.306 Å, c = 6.255 Å
α = 90.15°, β = 93.56°, γ = 82.08°
α = 90.15°, β = 93.56°, γ = 82.08°
Ratio:
a:b:c = 0.467 : 1 : 0.47
Unit Cell V:
511.50 ų (Calculated from Unit Cell)
Z:
1
Twinning:
On {014}.
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.91 Å | (100) |
| 5.68 Å | (70) |
| 4.40 Å | (50) |
| 4.15 Å | (50) |
| 2.824 Å | (50) |
| 2.84 Å | (45) |
| 3.39 Å | (40) |
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] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Svyazhinite
Place of Conservation of Type Material:
Sverdlovsk Mining Institute, Sverdlovsk; Il’menskii Preserve Museum, Miass, iz4524; Mining Institute, St. Petersburg, 1509/1; Vernadsky Geological Museum, Moscow, 53493; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 82772.
Associated Minerals at Type Locality:
Synonyms of Svyazhinite
Other Language Names for Svyazhinite
Relationship of Svyazhinite to other Species
Member of:
Other Members of Aubertite Group:
| Aubertite | CuAl(SO4)2Cl · 14H2O | Tric. 1 : P1 |
| Magnesioaubertite | (Mg,Cu)Al(SO4)2Cl · 14H2O | Tric. 1 : P1 |
| Wilcoxite | MgAl(SO4)2F · 17H2O | Tric. 1 : P1 |
Common Associates
Related Minerals - Strunz-mindat Grouping
| 7.DB.05 | Aubertite | CuAl(SO4)2Cl · 14H2O |
| 7.DB.05 | Magnesioaubertite | (Mg,Cu)Al(SO4)2Cl · 14H2O |
| 7.DB.10 | Rostite | Al(SO4)(OH) · 5H2O |
| 7.DB.10 | Khademite | Al(SO4)F · 5H2O |
| 7.DB.15 | Jurbanite | Al(SO4)(OH) · 5H2O |
| 7.DB.20 | Minasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.20 | Anorthominasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.20 | Orthominasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.25 | Bobjonesite | (V4+O)(SO4) · 3H2O |
| 7.DB.27 | Karpovite | Tl2VO(SO4)2(H2O) |
| 7.DB.30 | Metahohmannite | Fe3+2(SO4)2O · 4H2O |
| 7.DB.30 | Hohmannite | Fe3+2(SO4)2O · 8H2O |
| 7.DB.30 | Amarantite | Fe3+2(SO4)2O · 7H2O |
| 7.DB.35 | Calciocopiapite | CaFe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Zincocopiapite | ZnFe3+4(SO4)6(OH)2 · 18H2O |
| 7.DB.35 | Aluminocopiapite | Al2/3Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Copiapite | Fe2+Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Cuprocopiapite | Cu2+Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Magnesiocopiapite | MgFe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Ferricopiapite | Fe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O |
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 Svyazhinite
mindat.org URL:
https://www.mindat.org/min-3841.html
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Please feel free to link to this page.
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References for Svyazhinite
Reference List:
Localities for Svyazhinite
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.
Russia (TL) | |
| Pekov (1998) |
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Chernaya Rechka reserve-guard station, Ilmen Mountains, Chelyabinsk Oblast, Russia