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Kumtyubeite from
Xenolith no. 1, Lakargi Mountain, Upper Chegem volcanic caldera (Verkhnechegemskaya caldera), Baksan Valley, Kabardino-Balkaria, Russia


Classification
Species:Kumtyubeite
Formula:Ca5(SiO4)2F2
Comments:Kumtyubeite is noted in spurrite-rondorfite-ellestadite zones of skarn, developed along the west contact of the xenolith.

In hand specimens of the grayish-reddish matrix, kumtyubeite forms oval spots up to 1 cm across, composed of light pink grains 250 µm in maximum dimension. Kumtyubeite was also identified in another paragenesis in xenolith 1, associated with bultfonteinite, and intermediate compositions of the reinhardbraunsite-kumtyubeite series have been identified as rims on spurrite grains.
Colour:light pink
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Kumtyubeite data
Locality Data:Click here to view Xenolith no. 1, Lakargi Mountain, Upper Chegem volcanic caldera (Verkhnechegemskaya caldera), Baksan Valley, Kabardino-Balkaria, Russia
Data Identifiers
Mindat Occurrence Record ID:947082
Long-form Identifier:1:3:947082:8
GUID (UUID V4):866b5e1d-4a10-4b29-af36-3dc97ed68d74
References
Reference Search (possible matching items)
Journal (article/letter/editorial)
ALTERED XENOLITH IN IGNIMBRITES FROM UPPER CHEGEM CALDERA, NORTHERN CAUCASUS, KABARDINO-BALKARIA, RUSSIA:...Geochemistry (IGEM) RAS, Staromonetny 35, Moscow, Russia ROMAN WŁODYKA Faculty of Earth Sciences, Department...ABSTRACT Fluorchegemite, Ca7(SiO4)3F2 [Pbnm, a 5.0620(1), b 11.3917(2), c 23.5180(3) Å, V 1356.16(4) Å3, Z...chegemite, Ca7(SiO4)3(ОН)2 [Pbnm, a 5.0696(1), b 11.3955(1), c 23.5571(3) Å, V 1360.91(4) Å3, Z = 4],...calciferous xenolith within ignimbrites of the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia
Journal (article/letter/editorial)
from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia E. V. GALUSKIN1,*...PERTSEV2, A. E. ZADOV5, R. BAILAU1 AND A. G. GURBANOV2 1 2 3 4 5 Department of Geochemistry, Mineralogy...Geochemistry (IGEM) RAS, Staromonetny 35, Moscow, Russia Institute of Geochemistry, Mineralogy and Petrology...‘NEOCHEM’, Dmitrovskoye Highway 100/2, Moscow, Russia [Received 24 January 2011; Accepted 25 May 2011]...xenoliths in the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Megawite occurs
Journal (article/letter/editorial)
ignimbrite of Upper Chegem caldera, Northern Caucasus, Kabardino-Balkaria, Russia Evgeny V. Galuskin,1,* Biljana...2 Irina O. Galuskina,1 Nikolai N. Pertsev,3 Viktor M. Gazeev,3 Roman Włodyka,1 Mateusz Dulski,4 Piotr...Geochemistry (IGEM) RAS, Staromonetny 35, 119017 Moscow, Russia 4 Institute of Physics, University of Silesia,...Moscow, Russia 7 Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany 1 Abstract...ignimbrites of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia. The new minerals
Journal (article/letter/editorial)
garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia IRINA O. GALUSKINA1...GAZEEV5, NIKOLAI N. PERTSEV5 and LEONID DUBROVINSKY6 1 Faculty of Earth Sciences, Department of Geochemistry...Petrography (IGEM) RAS, Staromonetny 35, Moscow, Russia 6 Bayerisches Geoinstitut, Universität Bayreuth...of the bitikleitegroup, was discovered in a kumtyubeite zone in close proximity to the contact with unaltered...ignimbrite in a skarn xenolith from the Upper Chegem Caldera, Northern Caucasus, Russia. The empirical formula
Journal (article/letter/editorial)
Chlorkyuygenite from Upper Chegem, Northern Caucasus, Kabardino-Balkaria, Russia, a new microporous mineral...PERTSEV5, ALEKSANDER E. ZADOV6 and PIOTR DZIERŻANOWSKI7 1 Faculty of Earth Sciences, Department of Geochemistry...Moscow, Russia 6 OOO Science Research Centre ‘‘NEOCHEM’’, Dmitrovskoye Highway 100/2, Moscow, Russia 7 Institute...chlorkyuygenite, Ca12Al14O32[(H2O)4Cl2] (I43d, a¼12.0285(1)Å, V¼1740.34(3)Å3), was discovered as an accessory...ignimbrites of the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia. Rounded grains and
Report (issue)
Fracture: n.d. D(meas.) = n.d. D(calc.) = 4.708 [analysis 1] - 4.750 Tenacity: n.d. Hardness = n.d. Partially...ZrO2 SnO2 (1) 6.30 0.08 16.73 0.28 2.62 4.21 16.70 Al2O3 Sc2O3 Fe2O3 FeO MgO CaO Total (1) 6.17 0.05...02 23.86 99.04 (1) Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia; average of 9 electron...metasomatism of a thermally-altered carbonate-silicate xenolith (20 m long) in ignimbrite, the heat from which...sanidinite facies metamorphism in the xenolith. Association: Kumtyubeite, cuspidine, fluorchegemite, larnite
Journal (article/letter/editorial)
from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia IrIna O. GaluskIna,1,* EvGEny...EvGEny v. GaluskIn,1 ThOmas armbrusTEr,2 bIljana lazIc,2 jOachIm kusz,3 Piotr Dzierżanowski,4 vIkTOr m....Academy of Sciences, Staromonetny 35, 119017 Moscow, Russia 6 Institute of Materials, University of Silesia...NEOCHEM, Dmitrovskoye Highway 100/2, 127238 Moscow, Russia 1 absTracT Elbrusite-(Zr) Ca3(U Zr)(Fe Fe )O12...spurrite zones in skarn xenoliths of the Upper Chegem caldera. The empirical formula of holotype elbrusite-(Zr)
Journal (article/letter/editorial)
Leninskiy Prospekt 18 korp. 2, Moscow 119071, Russia 4 Mineral Resources Flagship, CSIRO, ARRC, 26 Dick...Avenue, Kensington, Western Australia 6151, Australia 1 In this issue This New Mineral Names has entries...crystal forms are {010}, {110}, {1.13.0}, and {021}. No twinning was detected during the single-crystal X-ray...transparent with a vitreous luster. Crystals show no cleavage, have a conchoidal fracture, and a Mohs...optically biaxial (+) with α = 1.643(1), β = 1.655(1), γ = 1.680(1), 2Vmeas = 70(2)° and 2Vcalc = 70.3°
 
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