Результаты исследований: Научные публикации в периодических изданиях › статья
Koksharovite, CaMg2Fe43+(VO4)(6), and grigorievite, Cu3Fe23+Al2(VO4)(6), two new howardevansite-group minerals from volcanic exhalations. / Pekov, I.V.; Zubkova, N.V.; Yapaskurt, V.O.; Kartashov, P.M.; Polekhovsky, Y.S.; Murashko, M.N.; Pushcharovsky, D.Y.
в: European Journal of Mineralogy, Том 26, № 5, 2014, стр. 679-688.Результаты исследований: Научные публикации в периодических изданиях › статья
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TY - JOUR
T1 - Koksharovite, CaMg2Fe43+(VO4)(6), and grigorievite, Cu3Fe23+Al2(VO4)(6), two new howardevansite-group minerals from volcanic exhalations
AU - Pekov, I.V.
AU - Zubkova, N.V.
AU - Yapaskurt, V.O.
AU - Kartashov, P.M.
AU - Polekhovsky, Y.S.
AU - Murashko, M.N.
AU - Pushcharovsky, D.Y.
PY - 2014
Y1 - 2014
N2 - Two new howardevansite-group minerals were discovered in the exhalations of fumaroles related to two volcanoes in Kamchatka, Russia. Koksharovite, CaMg2Fe43+(VO4)(6), is found at the Bezymyannyi volcano in association with bannermanite. Grigorievite, Cu3Fe23+Al2(VO4)(6), associated with bannermanite, ziesite, hematite, etc., was found at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano. Koksharovite occurs as equant to prismatic crystals up to 30 x 70 urn. It is translucent, yellowish-brown to reddish-brown with an adamantine lustre. Grigorievite forms prismatic to tabular crystals up to 40 x 100 mu m. It is opaque, black with a semi-metallic lustre. Both minerals are brittle. The VBN hardness is 368 and 489 kg mm(-2), the calculated density (D-calc) 3.39 and 3.67 g cm(-3) for koksharovite and grigorievite, respectively. In reflected light, koksharovite is light grey, grigorievite is grey; both minerals are weakly anisotropic. Reflectance values [k
AB - Two new howardevansite-group minerals were discovered in the exhalations of fumaroles related to two volcanoes in Kamchatka, Russia. Koksharovite, CaMg2Fe43+(VO4)(6), is found at the Bezymyannyi volcano in association with bannermanite. Grigorievite, Cu3Fe23+Al2(VO4)(6), associated with bannermanite, ziesite, hematite, etc., was found at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano. Koksharovite occurs as equant to prismatic crystals up to 30 x 70 urn. It is translucent, yellowish-brown to reddish-brown with an adamantine lustre. Grigorievite forms prismatic to tabular crystals up to 40 x 100 mu m. It is opaque, black with a semi-metallic lustre. Both minerals are brittle. The VBN hardness is 368 and 489 kg mm(-2), the calculated density (D-calc) 3.39 and 3.67 g cm(-3) for koksharovite and grigorievite, respectively. In reflected light, koksharovite is light grey, grigorievite is grey; both minerals are weakly anisotropic. Reflectance values [k
U2 - 10.1127/0935-1221/2014/0026-2400
DO - 10.1127/0935-1221/2014/0026-2400
M3 - Article
VL - 26
SP - 679
EP - 688
JO - European Journal of Mineralogy
JF - European Journal of Mineralogy
SN - 0935-1221
IS - 5
ER -
ID: 7020437