Vistepite
A valid IMA mineral species
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About Vistepite
Victor Ivanovich Stepanov (1924-1988).
Formula:
SnMn4B2Si4O16(OH)2
Colour:
Orange-yellow, amber yellow
Lustre:
Sub-Vitreous, Resinous
Hardness:
4½
Specific Gravity:
3.67
Crystal System:
Triclinic
Member of:
Name:
Named in 1992 by L. A. Pautov, D. I. Belakovskii, R. Scala, E. V. Sokolova, K. I. Ignatenko, and A. V. Mokhov in honor of Victor Ivanovich Stepanov (1924-1988), outstanding Soviet mineralogist and systematic mineral collector (Moscow).
Type Locality:
Isostructural with:
This page provides mineralogical data about Vistepite.
Unique Identifiers
Mindat ID:
4192
Long-form identifier:
mindat:1:1:4192:4
IMA Classification of Vistepite
Approved
IMA Formula:
Mn2+4Sn4+B2O2(Si2O7)2(OH)2
Approval year:
1991
First published:
1992
Classification of Vistepite
9.BD.25
9 : SILICATES (Germanates)
B : Sorosilicates
D : Si2O7 groups, with additional anions; cations in tetrahedral [4] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
D : Si2O7 groups, with additional anions; cations in tetrahedral [4] and greater coordination
78.1.10.1
78 : Unclassified Silicates
1 : Miscellaneous
78 : Unclassified Silicates
1 : Miscellaneous
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 |
|---|---|---|
| Vtp | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Vistepite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Vistepite
Sub-Vitreous, Resinous
Transparency:
Transparent
Colour:
Orange-yellow, amber yellow
Streak:
White
Hardness:
4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Three directions
Three directions
Density:
3.67 g/cm3 (Measured) 3.70 g/cm3 (Calculated)
Optical Data of Vistepite
Type:
Biaxial (-)
RI values:
nα = 1.696 nβ = 1.711 nγ = 1.715
2V:
Measured: 54° to 57°, Calculated: 54°
Max. Birefringence:
δ = 0.019
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:
r > v
Chemistry of Vistepite
Mindat Formula:
SnMn4B2Si4O16(OH)2
Element Weights:
Common Impurities:
Al,Fe,Ca
Crystallography of Vistepite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.973(2) Å, b = 7.365(2) Å, c = 7.665(1) Å
α = 89.94(2)°, β = 62.94(2)°, γ = 76.88(2)°
α = 89.94(2)°, β = 62.94(2)°, γ = 76.88(2)°
Ratio:
a:b:c = 0.947 : 1 : 1.041
Unit Cell V:
339.05 ų
Z:
1
Morphology:
Acicular
Twinning:
Twinned, with [100] as twin axis and (010) as composition plane; pseudo-monoclinic.
Comment:
Redefined (originally assumed to be monoclinic); twinned.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0005531 | Vistepite | Hybler J, Petricek V, Jurek K, Skala R, Cisarova I (1997) Structure determination of vistepite SnMn4B2Si4O16(OH)2: Isotypism with bustamite, revised crystallographic data and composition The Canadian Mineralogist 35 1283-1292 |  | 1997 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.392 Å | (100) |
| 3.210 Å | (82) |
| 2.230 Å | (69) |
| 2.826 Å | (59) |
| 1.6952 Å | (56) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Vistepite
General Appearance of Type Material:
Radial aggregates up to 15 mm.
Place of Conservation of Type Material:
Il'menskii Preserve Museum, Miass, Russia.
Vernadsky Geological Museum, Moscow, Russia, 57721.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 88595.
Vernadsky Geological Museum, Moscow, Russia, 57721.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 88595.
Geological Setting of Type Material:
Occurs in biotite-quartz hornfels at the margin of a Sn-bearing granite massif.
Associated Minerals at Type Locality:
Synonyms of Vistepite
Other Language Names for Vistepite
Relationship of Vistepite to other Species
Member of:
Other Members of Wollastonite Group:
| Barrydawsonite-(Y) | Na1.5Y0.5CaSi3O8(OH) | Mon. 2/m : P21/b |
| Bustamite | CaMn2+(Si2O6) | Tric. 1 : P1 |
| Cascandite | CaScSi3O8(OH) | Tric. 1 |
| Dalnegorskite | Ca5Mn2+(Si3O9)2 | Tric. 1 : P1 |
| Ferrobustamite | CaFe2+(Si2O6) | Tric. 1 |
| Mendigite | Mn2Mn2MnCa(Si3O9)2 | Tric. 1 : P1 |
| Murakamiite | LiCa2Si3O8(OH) | Tric. 1 : P1 |
| Pectolite | NaCa2Si3O8(OH) | Tric. 1 : P1 |
| Schizolite | NaCaMnSi3O8(OH) | Tric. 1 : P1 |
| Serandite | NaMn2+2Si3O8(OH) | Tric. 1 : P1 |
| Tanohataite | LiMn2Si3O8(OH) | Tric. 1 : P1 |
| Wollastonite | Ca3(Si3O9) | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.BD.05 | Bertrandite | Be4(Si2O7)(OH)2 |
| 9.BD.10 | Hemimorphite | Zn4Si2O7(OH)2 · H2O |
| 9.BD.15 | Junitoite | CaZn2Si2O7 · H2O |
| 9.BD.20 | Tinzenite | Ca2Mn2+4Al4[B2Si8O30](OH)2 |
| 9.BD.20 | Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
| 9.BD.20 | Dubińskaite | Ca4Sc2Al4[Be2Si8O30](OH)2 |
| 9.BD.20 | Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| 9.BD.20 | Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| 9.BD.30 | Boralsilite | Al16B6O30(Si2O7) |
| 9.BD.35 | Werdingite | (Mg,Fe)2Al14Si4B4O37 |
| 9.BD.40 | Vránaite | Al16B4Si4O38 |
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 Vistepite
mindat.org URL:
https://www.mindat.org/min-4192.html
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References for Vistepite
Localities for Vistepite
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.
Kyrgyzstan (TL) | |
| Pautov et al. (1992) +1 other reference |
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Rhodonite occurrence, Muzeinyi Valley, Inyl'chek Range, Issyk-Kul Region, Kyrgyzstan