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Betalomonosovite

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Formula:
Na64Ti4(Si2O7)2[PO3(OH)][PO2(OH)2]O2(OF)
Colour:
Yellowish-brown
Specific Gravity:
2.969 (Calculated)
Crystal System:
Triclinic
Name:
In allusion to its close relation with Lomonosovite.
First described by Gerasimovskiy and Kazakova (1962) from two pegmatites on the left and right banks of the Tyul'bnyunuai River, Lovozero massif, Kola, Russia. The status of betalomonosovite has been much discussed cause to difficulties of obtaining valid results on structure and chemical analysis. The poor quality of the crystals was related to an extensive cation and anion disorder present in the structure, including H2O (Sokolova et al. 2015). Betalomonosovite was, as a result discredited by IMA in 2013 (removed from the IMA list). Later Sokolova et al (2015) succeeded in refining the structure. Based on their work, betalomonosovite was reapproved by IMA in 2015 (IMA 14-J) (Sokolova et al. 2015).
Samples from Pyalkimporr Mountain, Lovozero Massif were used in the study of Sokolova et al 2015).
Isostructural with:
A Na-poor OH-bearing analogue of lomonosovite.

Betalomonosovite is a Group-IV TS-block mineral (Ti + Mg + Mn = 4 apfu). The crystal structure of betalomonosovite is an alternation of TS and I blocks of the composition Na4Ti4(Si2O7)2O2(OF) and Na2D4[PO3(OH)][PO2(OH)2], respectively (Sokolova et al 2015).

Compare 'UM1988-04-SiOPO:CaFeHNaNbTi'.


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Classification of BetalomonosoviteHide

Approved, 'Grandfathered' (first described prior to 1959)
Approval Year:
2015
9.BE.32

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination

Physical Properties of BetalomonosoviteHide

Colour:
Yellowish-brown
Density:
2.969 g/cm3 (Calculated)

Chemical Properties of BetalomonosoviteHide

Formula:
Na64Ti4(Si2O7)2[PO3(OH)][PO2(OH)2]O2(OF)
IMA Formula:
Na24Na2Ti2Na2Ti2(Si2O7)2[PO3(OH)][(PO2(OH)2]O2(OF)
Common Impurities:
Mn,Fe,Ca,Nb

Crystallography of BetalomonosoviteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.3331(7) Å, b = 14.172(2) Å, c = 14.509(2) Å
α = 14.509(2)°, β = 96.320(2)°, γ = 90.278(2)°
Ratio:
a:b:c = 0.376 : 1 : 1.024
Unit Cell V:
1060.7 ų
Comment:
space group P-1 to R = 6.64 %

Type Occurrence of BetalomonosoviteHide

General Appearance of Type Material:
Yellowish-brown plates to 5 X 4 X 0.3 cm
Geological Setting of Type Material:
Pegmatites of nepheline-syenites.
Associated Minerals at Type Locality:

Synonyms of BetalomonosoviteHide

Other Language Names for BetalomonosoviteHide

Relationship of Betalomonosovite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Lamprophyllite5 photos of Betalomonosovite associated with Lamprophyllite on mindat.org.
Aegirine4 photos of Betalomonosovite associated with Aegirine on mindat.org.
Astrophyllite2 photos of Betalomonosovite associated with Astrophyllite on mindat.org.
Eudialyte2 photos of Betalomonosovite associated with Eudialyte on mindat.org.
Lovozerite2 photos of Betalomonosovite associated with Lovozerite on mindat.org.
Lomonosovite1 photo of Betalomonosovite associated with Lomonosovite on mindat.org.
Hackmanite1 photo of Betalomonosovite associated with Hackmanite on mindat.org.
Marmatite1 photo of Betalomonosovite associated with Marmatite on mindat.org.

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 BetalomonosoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Gerasimovskii V.I., Kazakova M.E. (1950) Doklady AN SSSR, 142(3), 670-673 (in Russ.)
Izvestiya Akademii Nauk SSSR (1971): 82.
Rastsvetaeva R.K., Sirota M.I., Belov N.V. (1975) Crystal structure of betalomonosovite. Kristallografia, 20(2), 259-264 (in Russ.).
Khalilov A.D. (1990) Refinement of crystal structure of betalomonosovite from the Lovozero alkaline massif. Mineralogicheskii Zhurnal, 12(5), 10-19 (in Russ.).
Ageeva O.A. (1999) Typomorphism of accessory lomonosovite from rocks of Khibiny massif. Zapiski RMO, №2, 99-104 (in Russ.).
Yakubovich, O.V., Karimova, O.V., Ageeva, O.A., Borutsky, B.Ye. (2014): Crystal structure of «betalomonosovite»: new data. Zapiski RMO, 143(6), 88-103
CNMNC Newsletter No. 24, April 2015 ; Mineralogical Magazine, 79, 247-251.
Sokolova, E., Hawthorne, F. C., Abdu, Y.A., Genovese, A. & Cámara, F. (2015): Reapproval of betalomonosovite as a valid mineral species: single-crystal X-ray diffraction, HRTEM, Raman and IR. Periodico di Mineralogia, ECMS2015, 157-158
Sokolova, E., Abdu, Y., Hawthorne, F.C., Genovese, A., Cámara, F., Khomyakov, A.P. (2015): From structure topology to chemical composition. XVIII. Titanium silicates: Revision of the crystal structure and chemical formula of betalomonosovite, a group-IV TS-block mineral from the Lovozero Alkaline Massif, Kola Peninsula, Russia. Canadian Mineralogist, 53, 401-428

Internet Links for BetalomonosoviteHide

Localities for BetalomonosoviteHide

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.
Greenland
 
  • Kujalleq
    • Narsaq
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
          • Rasvumchorr Mt
            • Rasvumchorr Mine
[World of Stones 95:5-6, p64]
Pavel M. Kartashov data
        • Lovozero Massif
Yakovenchik, V.N., Ivaniuk, G.Yu., Pakhomovsky, Ya.A., Selivanova, E.A., Men'shikov, Yu.P., Korchak, J.A., Krivovichev, S.V., Spiridonova, D.V., Zalkind, O.A. (2010): Punkaruaivite, Li{Ti2(OH)2[Si4O11(OH)]}•H2O, a new mineral species from hydrothermalites of Khibiny and Lovozero alkaline massifs (Kola Peninsula, Russia). Canadian Mineralogist, 48, 41-50.
Gerasimovskii V.I., Kazakova M.E. (1950) Doklady AN SSSR, 142(3), 670-673 (in Rus.)
Sokolova, E., Abdu, Y., Hawthorne, F.C., Genovese, A., Cámara, F., Khomyakov, A.P. (2015): From structure topology to chemical composition. XVIII. Titanium silicates: Revision of the crystal structure and chemical formula of betalomonosovite, a group-IV TS-block mineral from the Lovozero Alkaline Massif, Kola Peninsula, Russia. Canadian Mineralogist, 53, 401-428
Pekov, I. V. (1998): Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures Ltd., Moscow, 369 pp.; Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp
Mineral and/or Locality  
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