Browsing by Author "Yakovenchuk V.N."
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Browsing by Author "Yakovenchuk V.N."
Now showing items 1-11 of 11
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Krivovichev S.V.; Yakovenchuk V.N.; Pakhomovsky Y.A.; Menshikov Y.P.; Burns P.C. (2003)The crystal structure of cafetite, ideally Ca[Ti2O5](H2O), (monoclinic, P21/n, a = 4.9436(15), b = 12.109(4), c = 15.911(5) Å, β = 98.937(5)°, V = 940.9(5) Å3, Z = 8) has been solved by direct methods and refined to R1 = ...
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Pakhomovsky Y.A.; Men'shikov Y.P.; Yakovenchuk V.N.; Ivanyuk G.Y.; Krivovichev S.V.; Burns P.C. (2002)Cerite-(La), ideally (La,Ce,Ca)(9)(Fe,Ca,Mg)(SiO4)(3)[SiO3(OH)](4)(OH)(3), was found in an aegirine-natrolite-microcline vein in foyaite, Mt. Yuksporr, Khibina massif, Kola Peninsula, Russia. It forms porous pseudomorphs ...
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Men'Shikov Y.P.; Pakhomovsky Y.A.; Yakovenchuk V.N.; Ivanyuk G.Yu.; Mikhailova J.A.; Selivanova E.A.; Krivovichev S.V.; Armbruster T. (2006)Chivruaiite is a new Ca titanosilicate [orthorhombic, Cmmm, a = 7.17(2), b = 22.98(9), c = 6.94(2) Å, V = 1144.4 Å3, Z = 1], chemically and structurally related to zorite. The mineral is found in three different hydrothermal ...
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Yakovenchuk V.N.; Pakhomovsky Y.A.; Ivanyuk G.Yu.; Men'shikov Y.P.; Krivovichev S.V.; Burns P.C. (2003)Chlorbartonite, ideally K6Fe24S26(Cl,S , is a new potassium iron sulfide chloride found as an accessory mineral in a microcline - pectolite - sodalite - aegirine vein within feldspathic urtite at Mount Koashva, Khibina ...
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Krivovichev S.V.; Britvin S.N.; Burns P.C.; Yakovenchuk V.N. (2002)The crystal structure of rimkorolgite, ideally Ba[Mg-5(H2O)(7)(PO4)(4)](H2O), (monoclinic, P2(1)/c, a = 8.3354(9), b = 12.8304(13), c = 18.313(2) Angstrom, beta = 90.025(2)degrees, V = 1958.5(4) Angstrom(3), Z = 4) has ...
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Krivovichev S.V.; Armbruster T.; Yakovenchuk V.N.; Pakhomovsky Y.A.; Men'shikov Y.P. (2003)The crystals of lamprophyllite-2M and lamprophyllite-2O were found coexisting in an ussingite-microcline-sodalite veins in the Alluaiv Mt., Lovozero alkaline massif, in association with ussingite, aegirine, microcline, ...
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Zolotarev Jr.A.A.; Krivovichev S.V.; Yakovenchuk V.N.; Pakhomovsky Ya.A.; Organova N.I.; Armbruster T. (2006)In recent years, minerals of the labuntsovite group (hereafter, LG) have become objects of many detailed mineralogical and crystallochemical studies stimulated by numerous findings of these minerals and the diversity of ...
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Zaitsev A.N.; Yakovenchuk V.N.; Chao G.Y.; Gault R.A.; Subbotin V.V.; Pakhomosky Y.A.; Bogdanova A.N. (1996)Kukharenkoite-(Ce), ideally Ba2Ce(CO3)3F, is a new rare-earth fluorocarbonate mineral, occurring as an accessory mineral in the late REE-carbonatites and REE-rich carbonate-zeolite rocks of the Khibina massif, Kola peninsula, ...
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Armbruster T.; Krivovichev S.V.; Weber T.; Gnos E.; Organova N.N.; Shlyukova Z.V.; Yakovenchuk V.N. (2004)The average crystal structures of two natural porous titanosilicates of the labuntsovite group, lemmleinite-Ba and lemmleinite-K, ideally Na4K4Ba2Ti8(Si4O 12)4O4(OH)4·8H 2O and Na4K4K2Ti 8(Si4 O12)4O 2(0H)6·8H2O, respectively, ...
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Krivovichev S.V.; Yakovenchuk V.N.; Armbruster T.; Döbelin N.; Pattison P.; Weber H.-P.; Depmeier W. (2004)The crystal structure of yuksporite, (Sr,Ba)2K4(Ca,Na)14(□,Mn,Fe){(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, where n ~ 3 [monoclinic, P21/m, a = 7.126(3), b = 24.913(6), c = 17.075(7) Å, β = 101.89(3)°, V = 2966.4(17) Å3] ...
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Krivovichev S.V.; Depmeier W.; Yakovenchuk V.N.; Pakhomovsky Y.A.; Armbruster T.; Weber H.-P. (2004)The structure of shafranovskite, ideally K2Na3(Mn,Fe,Na)4[Si9(O,OH) 27](OH)2·nH2O (n ∼ 2.33), a K-Na-manganese hydrous silicate from Kola peninsula, Russia, was studied using synchrotron X-ray radiation and a MAR345 ...
Now showing items 1-11 of 11