Belyankinite (original) (raw)
A valid IMA mineral species - grandfathered - questionable
About BelyankiniteHide
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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
Specific Gravity:
2.32 - 2.4
Name:
Named in honor of Dmitry Stepanovich Belyankin (11 (23) August 1876, Lamanich, Vologda Province, Russian empire - 20 June 1953, Moscow, Russia), prominent Russian mineralogist and petrographer. He headed, at different times, the Petrographic Institute, the Institute of Geological Sciences, and the Mineralogical Museum at the USSR Academy of Sciences. Also the Kola branch of the USSR Academy of Sciences (Kirovsk). He is considered a founder of technical petrography.
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.)
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:619:8
65883e10-e41c-4976-88f9-305953a0e79f
IMA Classification of BelyankiniteHide
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Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
Ca1-2(Ti,Zr,Nb)5O12 · 9H2O (?)
Type description reference:
Classification of BelyankiniteHide
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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
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Byn | 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 BelyankiniteHide
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Colour:
White, light yellow to brownish-yellow; black when manganese-rich
Cleavage:
Perfect
in one direction, parallel to the plates
Fracture:
Irregular/Uneven
Density:
2.32 - 2.4 g/cm3 (Measured)
Optical Data of BelyankiniteHide
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RI values:
_n_α = 1.740 _n_β = 1.772 - 1.778 _n_γ = 1.775 - 1.780
δ = 0.035 - 0.040
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
r > v, moderate
Comments:
X = brown to dark brown, Y = light brown to yellow-brown, Z = light brown; Orientation: X = a, Y = b, Z = c
Chemistry of BelyankiniteHide
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Mindat Formula:
Ca1-2(Ti,Nb)5O12 · 9H2O (?)
Crystallography of BelyankiniteHide
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Morphology:
In platy aggregates or massive, to 20 cm
Comment:
Crystal Data: Orthorhombic or monoclinic. Point Group: n.d. Space Group: n.d. Z = n.d.
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 1.690 Å | (10) |
| 3.21 Å | (8) |
| 2.48 Å | (6) |
| 1.361 Å | (5) |
| 2.90 Å | (3) |
| 2.18 Å | (3) |
| 1.633 Å | (2) |
Comments:
Recorded on type material, after heating to 900 °C
Geological EnvironmentHide
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Type Occurrence of BelyankiniteHide
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Geological Setting of Type Material:
In nepheline syenite in an alkalic massif, included in aegirine and microcline
Associated Minerals at Type Locality:
Reference:
Gerasimovskii, V.I., Kazakova, M.E. (1950) Belyankinite - a new mineral. Doklady Akademii Nauk SSSR: 71: 925-927 (in Russian).
Other Language Names for BelyankiniteHide
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Relationship of Belyankinite to other SpeciesHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 4.FM. | Charleshatchettite | CaNb4O10(OH)2 · 8H2O | Mon. 2/m : _B_2/b |
|---|---|---|---|
| 4.FM. | Dinilawiite | [Pb4O2Al(OH)5]2(S2O3)2 · H2(S2O3)(H2O)5 | Mon. 2/m |
| 4.FM. | Yttrotungstite-(Nd) | NdW2O7(OH) · H2O | Mon. 2/m : _P_21/m |
| 4.FM.15 | Franconite | Na(Nb2O5)(OH) · 3H2O | Mon. |
| 4.FM.15 | Hochelagaite | (Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O | Mon. |
| 4.FM.15 | Ternovite | (Mg,Ca)Nb4O11 · nH2O | Mon. |
| 4.FM.25 | Gerasimovskite | (Mn,Ca)(Nb,Ti)5O12 · 9H2O | Amor. |
| 4.FM.25 | Manganbelyankinite | (Mn,Ca)(Ti,Nb)5O12 · 9H2O | |
| 4.FM.30 | Silhydrite | Si3O6 · H2O | Orth. |
| 4.FM.35 | Cuzticite | Fe3+2(TeO6) · 3H2O | Hex. |
| 4.FM.50 | Qatranaite | CaZn2(OH)6(H2O)2 | Mon. 2/m : _P_21/b |
| 4.FM.55 | Hydroplumbite | 3PbO · H2O |
Other InformationHide
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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 BelyankiniteHide
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References for BelyankiniteHide
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Localities for BelyankiniteHide
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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
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