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About LobanoviteHide

Constantin Valentinovich Lobanov
Straw yellow to orange
Specific Gravity:
3.161 (Calculated)
Crystal System:
Originally named for the relationship to astrophyllite.
The name lobanovite honors Dr. Constantin V. Lobanov, a Russian geologist working in the Kola Peninsula. First described in 1959 as "unusual light yellow and greenish fibrous astrophyllite" by E.I. Semenov from Kukisvumchorr Mt, Khibiny, Kola, Russia (Pekov 1998). Peng & Ma (1963) established its monoclinic symmetry. Formally described as a new mineral, as Lobanovite, from Mt. Yukspor, Khibiny, Kola, Russia by Sokolova et al. (2017).
Unique combination of elements.

Originally named and published as "magnesium astrophyllite" and "magnesioastrophyllite". Validated by IMA in 2015 under the name lobanovite (IMA 15-B).

The structure is based on HOH blocks comprising one cp octahedral and two heteropolyhedral sheets; the HOH blocks repeat along [001]. The O sheet is built of M(1-4) octahedra; the H sheet is formed by T4O12 astrophyllite ribbons having common vertices with D polyhedra dominated by VTi. K and Na atoms are in the interstitial A and B sites.

Classification of LobanoviteHide

Approval year:
First published:

9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12

69 : INOSILICATES Chains with Side Branches or Loops
1 : Chains with Side Branches or Loops with (P=2, and N=4, 2 branches)

14 : Silicates not Containing Aluminum
9 : Silicates of Ti

Physical Properties of LobanoviteHide

Straw yellow to orange
3.161 g/cm3 (Calculated)

Optical Data of LobanoviteHide

Biaxial (-)
RI values:
nα = 1.658 nβ = 1.687 nγ = 1.710
Measured: 81.5° to 83°, Calculated: 82°
Max Birefringence:
δ = 0.052
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r < v strong

Chemical Properties of LobanoviteHide

Common Impurities:

Crystallography of LobanoviteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 5.3327(2) Å, b = 23.1535(9) Å, c = 10.3775(4) Å
β = 99.615(1)°
a:b:c = 0.23 : 1 : 0.448
Unit Cell V:
1263.3 ų
elongated blades up to 0.2 x 0.04 mm

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009902LobanoviteShi N, Ma Z, Li G, Yamnova M A, Pushcharovsky D Y (1998) Structure refinement of monoclinic astrophyllite Acta Crystallographica B54 109-1141998Khibina alkaline massif, Russia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.38 100 Å(003)
2.548 90 Å(063)
10.1 80 Å(001)
3.80 60 Å(042 131)
3.079 50 Å(132 062)
2.763 90 Å(⎯171)

Type Occurrence of LobanoviteHide

General Appearance of Type Material:
Elongated blades
Geological Setting of Type Material:
Pegmatitic cavities
Associated Minerals at Type Locality:

Synonyms of LobanoviteHide

Relationship of Lobanovite to other SpeciesHide

Other Members of this group:
Devitoite[Ba6(PO4)2(CO3)][Fe2+7(OH)4Fe3+2O2(Si4O12)2]Tric. 1 : P1
SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4Tric. 1 : P1

Related Minerals - Nickel-Strunz GroupingHide

9.DC.05AstrophylliteK2NaFe2+7Ti2Si8O26(OH)4FTric. 1 : P1
9.DC.05NiobokupletskiteK2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F)Tric. 1 : P1
9.DC.05NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4FTric. 1 : P1
9.DC.05SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4Tric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide 1 : P1,Na)3(Mn,Fe)7Ti2Si8O26(OH)4FTric.,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31Tric.,Mn2+)7Ti2Si8O26(OH)4FTric. 1 : P1,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31Tric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.9.2LorenzeniteNa2Ti2(Si2O6)O3Orth. mmm (2/m 2/m 2/m) : Pbcn
14.9.3LintisiteLiNa3Ti2(Si2O6)2O2 · 2H2OMon.
14.9.6TitaniteCaTi(SiO4)OMon. 2/m : P21/b
14.9.7OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon.
14.9.9BenitoiteBaTi(Si3O9)Hex. 6 m2 : P62c
14.9.11FresnoiteBa2Ti(Si2O7)OTet. 4mm : P4bm
14.9.12Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2OMon. 2 : B2
14.9.13Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2OOrth.
14.9.14StrontiojoaquiniteSr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2OMon.
14.9.15Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2OOrth.
14.9.16Strontio-orthojoaquinite(Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2OOrth.
14.9.18HejtmaniteBa2Mn2+4Ti2(Si2O7)2O2(OH)2F2Tric. 1
14.9.19Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2OMon.
14.9.22Perrierite-(Ce)Ce4MgFe3+2Ti2(Si2O7)2O8Mon. 2/m : P21/b
14.9.25TisinaliteNa3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2OTrig.
14.9.26NeptuniteNa2KLiFe2+2Ti2Si8O24Mon. m : Bb
14.9.29AstrophylliteK2NaFe2+7Ti2Si8O26(OH)4FTric. 1 : P1
14.9.32BaratoviteKCa7(Ti,Zr)2Li3Si12O36F2Mon. 2/m : B2/b
14.9.34AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]Tric. 1 : P1
14.9.35SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
14.9.37Janhaugite(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2Mon. 2/m : P21/m
14.9.38KoashviteNa6(Ca,Mn)(Ti,Fe)Si6O18 · H2OOrth.

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 LobanoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Semenov, E. I. (1959): Litium micas and hydromicas and other ones in alkaline pegmatites of the Kola peninsula.Proceedings of Fersman Mineralogical Museum, Aca. Sci. USSR : 9: 107-137 [In Russian]
Peng, C. C. & Ma, C. S. (1963) The discovery of a new type of Si-O chain radical - X-ray analysis of astrophyllite. Scientia Sinica: 12: 272-276 (In Russian)
Fleischer M., Chao, G. Y., & Cabri, L. J. (1975) New mineral names. American Mineralogist: 60: 736-739 [Abstract, as Monoclinic Magnesium Astrophyllite]
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow. [As Magnesium Astrophyllite]
Canadian Mineralogist (2003): 41: 1-26.
Sokolova, E. & Cámara, F. (2008): Re-investigation of the crystal structure of magnesium astrophyllite(sic!). European Journal of Mineralogy, 20, 253-260.
Buke, E.A.J. (2008): Tidying up Mineral Names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks, Mineralogical Record 39,131(2008)
Sokolova, E., Cámara, F., Hawthorne, F.C., Semenov, E.I., Ciriotti, M.E. (2017): Lobanovite, K2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4, a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite. Mineralogical Magazine: 81: 175-181.

Internet Links for LobanoviteHide

Localities for LobanoviteHide

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.
  • Murmansk Oblast
    • Khibiny Massif
      • Koashva Mt
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; [World of Stones 95:5-6, p64]
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Takai, Y., Uehara, S., Inoo, T. (2011) Minerals from Khibiny, Kola, Russia. Chigaku Kenkyu, 60 (1), 41-46.
        • Rasvumchorr Mine
Pekov I.V., Zubkova N.V., Filinchuk Ya.E., Chukanov N.V., Zadov A.E., Pushcharovsky D.Yu., Gobechiya E.R. (2010): Shlykovite, KCa[Si4O9(OH)]·3H2O, and cryptophyllite, K2Ca[Si4O10]·5H2O, two new mineral species from the Khibiny alkaline complex, Kola Peninsula, Russia. Zapiski RMO, 139(1), 37-50.
      • The Carbonatite Stock in the vicinity of Tul'ilukht Bay
[Mandarino, 1997]
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Sokolova, E., Cámara, F., Hawthorne, F.C., Semenov, E.I., Ciriotti, M.E. (2017): Lobanovite, K2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4, a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite. Mineralogical Magazine: 81: 175-181
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