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Belyankinite

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Formula:
Ca1-2(Ti,Nb)5O12 · 9H2O (?)
Colour:
White, light yellow to brownish-yellow; black when manganese-rich
Lustre:
Vitreous, Greasy, Pearly
Hardness:
2 - 3
Specific Gravity:
2.32 - 2.4
Crystal System:
Amorphous
Name:
For Dmitry Stepanovich Belyankin (1876-1953), prominent Russian mineralogist and petrographer.
A mineral of questionable status. Some authors suggest that belyankinite is just a mixture of minerals (mostly anatase) which forms as a common alteration product of murmanite or lomonosovite (Yakovenchuk et. al. Khibiny. Laplandia Minerals, Apatity, 2005, 466 p.)


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Classification of BelyankiniteHide

Approved, 'Grandfathered' (first described prior to 1959), Questionable
4.FM.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
M : Hydroxides with H2O +- (OH); unclassified
8.7.8.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
18.1.12

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Physical Properties of BelyankiniteHide

Vitreous, Greasy, Pearly
Transparency:
Opaque
Colour:
White, light yellow to brownish-yellow; black when manganese-rich
Hardness:
2 - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
in one direction, parallel to the plates
Fracture:
Irregular/Uneven
Density:
2.32 - 2.4 g/cm3 (Measured)    

Optical Data of BelyankiniteHide

Type:
Biaxial (-)
RI values:
nα = 1.740 nβ = 1.772 - 1.778 nγ = 1.775 - 1.780
2V:
Measured: 21° to 25°
Max Birefringence:
δ = 0.035 - 0.040
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v, moderate
Pleochroism:
Visible
Comments:
X = brown to dark brown, Y = light brown to yellow-brown, Z = light brown; Orientation: X = a, Y = b, Z = c

Chemical Properties of BelyankiniteHide

Formula:
Ca1-2(Ti,Nb)5O12 · 9H2O (?)
IMA Formula:
Ca1-2(Ti,Zr,Nb)5O12 · 9H2O

Crystallography of BelyankiniteHide

Crystal System:
Amorphous
Morphology:
In platy aggregates or massive, to 20 cm

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
1.690 (10)
3.21 (8)
2.48 (6)
1.361 (5)
2.90 (3)
2.18 (3)
1.633 (2)
Comments:
Recorded on type material, after heating to 900 °C

Type Occurrence of BelyankiniteHide

Other Language Names for BelyankiniteHide

Relationship of Belyankinite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Natrolite1 photo of Belyankinite associated with Natrolite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.FM.15FranconiteNa(Nb2O5)(OH) · 3H2OMon.
4.FM.15Hochelagaite(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2OMon.
4.FM.15Ternovite(Mg,Ca)Nb4O11 · nH2OMon.
4.FM.25Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O
4.FM.25Manganbelyankinite(Mn,Ca)(Ti,Nb)5O12 · 9H2O
4.FM.30Silhydrite3SiO2 · H2OOrth.
4.FM.35CuzticiteFe3+2(TeO6) · 3H2OHex.

Related Minerals - Dana Grouping (8th Ed.)Hide

8.7.8.2Manganbelyankinite(Mn,Ca)(Ti,Nb)5O12 · 9H2O
8.7.8.3Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

18.1.1LithiotantiteLiTa3O8Mon.
18.1.2LueshiteNaNbO3Orth. mmm (2/m 2/m 2/m)
18.1.3NatroniobiteNaNbO3Mon.
18.1.4FranconiteNa(Nb2O5)(OH) · 3H2OMon.
18.1.5NatrotantiteNa2Ta4O11Mon.
18.1.6IrtyshiteNa2(Ta,Nb)4O11Hex.
18.1.7Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31Orth. mmm (2/m 2/m 2/m) : Cmmm
18.1.8Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.9CalciotantiteCaTa4O11Hex.
18.1.10RynersoniteCaTa2O6Orth. mmm (2/m 2/m 2/m)
18.1.11Microlite GroupIso. m3m (4/m 3 2/m) : Fd3m
18.1.13LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma
18.1.14Hochelagaite(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2OMon.
18.1.15Bariomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.16ParabariomicroliteBaTa4O10(OH)2 · 2H2OTrig.
18.1.17Bariopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6ZIso. m3m (4/m 3 2/m) : Fd3m
18.1.18AlumotantiteAlTaO4Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.19SimpsoniteAl4(Ta,Nb)3O13(OH,F)Trig. 3 : P3
18.1.20Sosedkoite(K,Na)5Al2(Ta,Nb)22O60Orth.
18.1.21Thoreaulite(Sn2+,Pb)(Ta,Nb)2O6Mon.
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23FoorditeSn2+(Nb,Ta)2O6Mon. 2/m : B2/b
18.1.24ChangbaiitePbNb2O6Trig.
18.1.25Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSb(Nb,Ta)O4Orth. mm2
18.1.28StibiotantaliteSb(Ta,Nb)O4Orth. mm2
18.1.29NatrobistantiteIso.
18.1.30Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24Tet.
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.34BismutotantaliteBi(Ta,Nb)O4Orth.
18.1.35Bismutomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.36Tantalite-(Mn)MnTa2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.37Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O
18.1.38Tapiolite-(Mn)(Mn,Fe)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
18.1.39Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.40WodginiteMn2+Sn4+Ta2O8Mon.
18.1.41Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8Orth.
18.1.42Columbite-(Fe)FeNb2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.43Tantalite-(Fe)FeTa2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.44ColumbiteOrth. mmm (2/m 2/m 2/m) : Pbcn
18.1.45Tantalite(Mn,Fe)(Ta,Nb)2O6
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m)
18.1.47Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
18.1.48Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6Orth.
18.1.50Strüverite(Ti,Ta,Fe)O2
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

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 BelyankiniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Gerasimovskii, V. I. and Kazakova, M. E. (1950): Belyankinite - a new mineral. Doklady Akademii Nauk SSSR 71, 925-927 (in Russian). - American Mineralogist (1952), 37, 882 (abstract).
Semenov, E. I. (1957): Oxides and hydroxides of titanium and niobium in the Lovozero alkalic massif. Inst. mineral., geokhim., and crystallokhim. redkikh elementov, Trudy 1, 41-59 (in Russian). - American Mineralogist (1958), 43, 1220-1221 (abstract).
Vlasov, K. A., Kuz'menko, M. V. and Es'kova, E. M. (1966): The Lovozero alkali massif. Akad. Nauk SSSR, 390-392 (in English).
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 51.

Internet Links for BelyankiniteHide

Localities for BelyankiniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Egypt
 
  • Red Sea Governorate
    • Eastern Desert
Gehad M. Saleh (2007) Rare-Metal Pegmatites from the Southeastern Desert, Egypt: Geology, Geochemistry, and Petrogenesis. International Geology Review Vol. 49:824-843.
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
www.koeln.netsurf.de/~w.steffens/khib.htm; Mitchell, R. H., & Chakhmouradian, A. R. (1998). Th-rich loparite from the Khibina alkaline complex, Kola Peninsula: isomorphism and paragenesis. Mineralogical Magazine, 62(3), 341-353.
      • Lovozero Massif
Pavel Kartashov (2016)
Pekov, I.V. (2000): Lovozero Massif: History, Pegmatites, Minerals. Ocean Pictures LTD, Russia. 480p
[World of Stones 95:5-6, p64]
        • Tyul'bnyunuai River Valley
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; American Mineralogist 37:802
Mineral and/or Locality  
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