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Vistepite

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About VistepiteHide

Victor Ivanovich Stepanov (1924-1988).
Formula:
SnMn4B2Si4O16(OH)2
Colour:
Orange-yellow, amber yellow
Lustre:
Sub-Vitreous, Resinous
Hardness:
Specific Gravity:
3.67
Crystal System:
Triclinic
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).
This page provides mineralogical data about Vistepite.


Classification of VistepiteHide

Approved
Approval Year:
1991
9.BD.25

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

Pronounciation of VistepiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of VistepiteHide

Sub-Vitreous, Resinous
Transparency:
Transparent
Colour:
Orange-yellow, amber yellow
Streak:
White
Hardness:
4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Three directions
Density:
3.67 g/cm3 (Measured)    3.70 g/cm3 (Calculated)

Optical Data of VistepiteHide

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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v

Chemical Properties of VistepiteHide

Formula:
SnMn4B2Si4O16(OH)2
IMA Formula:
Mn4SnB2O2(Si2O7)2(OH)2
Common Impurities:
Al,Fe,Ca

Crystallography of VistepiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
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)°
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

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.392 (100)
3.210 (82)
2.230 (69)
2.826 (59)
1.6952 (56)

Type Occurrence of VistepiteHide

Synonyms of VistepiteHide

Other Language Names for VistepiteHide

German:Vistepit
Spanish:Vistepita

Relationship of Vistepite to other SpeciesHide

Other Members of this group:
Barrydawsonite-(Y)Na1.5Y0.5CaSi3O9HMon. 2/m : P21/b
BustamiteCaMn2+(Si2O6)Tric. 1 : P1
CascanditeCa(Sc,Fe3+)(HSi3O9)Tric. 1
FerrobustamiteCaFe2+(Si2O6)Tric.
MurakamiiteCa2LiSi3O8(OH)Tric. 1 : P1
PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
SchizoliteNaCaMnSi3O8(OH)Tric. 1 : P1
SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
TanohataiteLiMn2(HSi3O9)Tric. 1 : P1
WollastoniteCaSiO3Tric. 1 : P1

Common AssociatesHide

CassiteriteSnO2
CelsianBa(Al2Si2O8)
ChalcopyriteCuFeS2
FluoriteCaF2
GalenaPbS
HelvineBe3Mn2+4(SiO4)3S
HelvineBe3Mn2+4(SiO4)3S
Neotocite(Mn,Fe,Mg)SiO3 · H2O
PyriteFeS2
QuartzSiO2
RhodochrositeMnCO3
RhodoniteMn2+SiO3
SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
SpessartineMn2+3Al2(SiO4)3
SphaleriteZnS
StanniteCu2FeSnS4
TephroiteMn2+2SiO4
Associated Minerals Based on Photo Data:
Rhodonite1 photo of Vistepite associated with Rhodonite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.BD.05BertranditeBe4(Si2O7)(OH)2Orth. mm2 : Cmc21
9.BD.10HemimorphiteZn4Si2O7(OH)2 · H2OOrth. mm2 : Imm2
9.BD.15JunitoiteCaZn2Si2O7 · H2OOrth. mm2
9.BD.20Axinite-(Fe)Ca2Fe2+Al2BSi4O15OHTric. 1 : P1
9.BD.20Axinite-(Mg)Ca2MgAl2BSi4O15OHTric.
9.BD.20Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)Tric. 1 : P1
9.BD.20TinzeniteCa2Mn2+4Al4[B2Si8O30](OH)2Tric.
9.BD.30BoralsiliteAl16B6Si2O37Mon. 2/m : B2/m
9.BD.35Werdingite(Mg,Fe)2Al14Si4B4O37Tric.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for VistepiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pautov, L. A.; Belakovsky, D. I.; Scala, R.; Sokolova, E. V.; Ignatenko, K. I.; Mokhov, A. V. (1992): Vistepite Mn5SnB2Si5O20 - a new borosilicate mineral of manganese and tin. Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 121, 107-112 (in Russian).
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
New Minerals (1997), New Minerals 1990-1994.
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. Canadian Mineralogist 35, 1283-1292.

Internet Links for VistepiteHide

Localities for VistepiteHide

ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Kyrgyzstan (TL)
 
  • Issyk-Kul Oblast (Ysyk-Köl Oblast)
    • Inyl'chek Range
      • Muzeinyi Valley
Pautov L.A., Belakovskii D.I., Skala R. e.a. Vistepite MnSnB2Si5O20 - a new borosilicate of manganese and tin, - ZVMO, 1992, 121, no. 4, 107-112; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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