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Journal/NDM45 2010 eng
New data on Minerals. Volume 45. 2010. 168 pages, 99 images, drawings, schemes.
Editor: Prof. Margarita I. Novgorodova.
Publication of the Institution of Russian Academy of Sciences, Fersman Mineralogical Museum RAS.
Содержание
Summary
This volume contains papers on the newly discovered mineral species – aleksandrovite, the Sn-analogue of
baratovite, and åskagenite-(Nd), a new mineral of epidote supergroup. Discoveries of the rare minerals –
irarsite (from ores of the Shanuch deposit in Kamchatka), orickite, jaipurite, westerveldite, edgarite, tungstenite
and other chalcogenides (from the Khibiny massif in Kola peninsula) are described. New data on
accessory minerals from the Semeninskaya pit in the Aduy pegmatite field in the Ural Mts., on arsenosulvanite
and other sulphides from the Lebedinoe deposit in the Aldan Mts., on the composition and features
of native gold from an ore occurrence in South-Eastern Kamchatka, are given. Zoned crystals of monazite(Ce)
from granite pegmatites of the Ilmeny Mts. are studied, including radiology dating. Problems of mineralogy and geochemistry of tetravalent uranium, uranium ores and sulfide-oxide associations in modern
submarine pyrites, are covered.
In the chapter “Mineral museums and collections” there is a paper on the exhibition in the Fersman
Mineralogical Museum RAS dedicated to the 125th anniversary of Alexander N. Labuntsov – the discoverer
of apatite deposits in the Khibiny Mts.
The next chapter – “Personalities” – for the first time brings forward letters found in the RAS archives from
Alexander N. Labuntsov to academician Vladimir I. Vernadsky.
The “Mineralogical notes” chapter includes description of rare intergrowth twins of magnetite from the
Kurzhunkul deposit, Kazakhstan, and discussion of previous mistakes in the calculation of the chemical composition
of some minerals.
The “Discussions” is represented by the paper on the problems of the definition of a valid mineral species and
metastable mineralization.
The journal is of interest to mineralogists, geochemists, geologists and also researchers of Natural History
museums, collectors and amateurs.
Editorial Board
- Editor in Chief Margarita I. Novgorodova, Doctor in Science, Professor
- Executive Editor Elena A. Borisova, Ph.D.
- Eugeny I. Semenov, Doctor in Science,
- Svetlana N. Nenasheva, Ph.D.,
- Elena N. Matvienko, Ph.D.,
- Marianna B. Chistyakova, Ph.D.,
- Mikhail E. Generalov, Ph.D.
Publishing group
- Photo Michael B. Leybov
- Leader of Publishing group Michael B. Leybov
- Managing Editor Ludmila A. Cheshko
- Art Director Nikolay O. Parlashkevich
- Editor Andrey L. Cheshko
- Design and Layout Ivan A. Glazov
- Translators Maria S. Alferova, Il'ya A. Anisimov, Ivan A. Baksheev, Mark Fed’kun, Valerii V. Gerasimovskii, Mikhail Povarennykh
- Editors (English Style) Patricia Gray, Frank C. Hawthorne, Peter Modreski
Authorized for printing by Institution of Russian Academy of Sciences, Fersman Mineralogical Museum RAS
Text, photo, drawings and schemes, Institution of Russian Academy of Sciences,
Fersman Mineralogical Museum RAS, 2010
Design BRITAN Ltd, 2010
Published by Institution of Russian Academy of Sciences, BRITAN Ltd
Fersman Mineralogical Museum RAS Box 71 Moscow
Bld. 18/2 Leninskii Prospekt Moscow 119071 Russia Phone/fax +7 (495) 629-48-12
Phone +7 (495) 952-00-67; fax +7 (495) 952-48-50 email: minbooks@online.ru
email: mineral@fmm.ru www.minbook.com
www.fmm.ru
Circulation 300 copies
Printed in Russia
Сontent
New Minerals and Their Varieties, New Finds of Rare Minerals, Mineral Paragenesis
Aleksandrovite, KLi3Ca7Sn2[Si6O18]2F2 – a new tin mineral, p. 5 - 16
Aleksandrovite, KLi3Ca7Sn2[Si6O18]2F2 is a new mineral, the tin analogue of baratovite. It was discovered in a moraine boulder of microcline-calcite rock, along with quartz, albite, aegirine-hedenbergite pyroxene, in the Darai-Pioz glacier (Tajikistan). The mineral association is represented by baratovite, fluorite, miserite, Sn-bearing titanite, bazirite, pabstite, Sn-bearing sogdianite, sugilite, turkestanite, fluorapatite (apatite(CaF)). The new mineral occurs in two types: a) minute (up to 50–70 μm) lamellar grains with no zoning visible under BSE, and b) crystals (up to 0.8 mm) and aggregates of zoned and sectorial grains with separate zones of aleksandrovite, and baratovite or katayamalite. The mineral is colourless, transparent, with vitreous lustre and pearl lustre on cleaved surface. Streak colour is white. Cleavage is perfect along (001). Density (measured) = 3.05(2) g/cm3, density (calculated) = 3.07(2) g/cm3. Microhardness is 300 kg/mm2. Mohs hardness is 4–4.5. It fluoresces light-blue under short wave UV (254 nm). The mineral is biaxial, optically negative: np = 1.629(2), nm = 1.635(4), ng = 1.638(2) (589 nm); 2V (calculated) = –70.3°. Dispersion is strong, r > v. Elongation is positive, angle of extinction varies from 0° to 22°. Aleksandrovite is monoclinic, C2/c, a = 17.01(2), b = 9.751(6), c = 21.00(2) Å, b = 112.45(8)° , V = 3219(7) Å3 , Z = 4. The strongest X-Ray lines are as follows: (d in Å (I) (hkl)): 4.86(21)(31–1); 3.712(33)(312); 3.234(100)(006); 3.206(34)(223); 3.039(28)(025); 2.894(42)(314); 2.425(42)(008); 1.950(25)(426). Chemical analysis (EMPA, an average out of 17 analyses; Li2O – ICP OES, H2O – calculated; wt.%): SiO2 – 48.01, Al2O3 – 0.07, TiO2 – 2.86, SnO2 – 12.84, ZrO2 – 1.27, Nb2O5 – 0.11, Fe2O3 – 0.27, Ce2O3 – 0.04, MgO – 0.05, CaO – 25.52, SrO – 0.39, Na2O – 0.20, K2O – 2.91, Li2O – 3.01, F – 1.71, H2O – 0.39, (-O=F2) = 0.72, total 99.12. Empiric formula of aleksandrovite - (K0.93Na0.10)1.03Li3.02(Ca6.82Sr0.06Mn0.04Mg0.02)6.94(Sn1.28Ti0.54 Zr0.15Fe0.05Nb0.01)2.03(Si11.98Al0.02)12O36.00[F1.35(OH)0.65]2.00. IR spectrum of aleksandrovite is similar to that of baratovite, the strongest absorption strips are: 1083, 1024, 974, 950, 673, 607, 568, 520, 470, 440 cm-1. Compatibility index is 1 – (Kp/Kc) = –0.005. The mineral is named to honour of the well-known Russian geochemist, geologist and mineralogist Stanislav Mikhailovich Aleksandrov (born in 1932) for his great contribution in geology, geochemistry and mineralogy of tin. The type specimen is stored in the Fersman Mineralogical Museum RAS in Moscow (registration number 3825/1). читать далее...
Åskagenite(Nd), Mn2+NdAl2Fe3+(Si2O7)(SiO4)O2 – a new mineral of the epidote supergroup, p. 17 - 22
Irarsite discovery in copper-nickel ores of Shanuch deposit (Kamchatka), p. 23 - 27
New data on the accessory minerals of the Semeninskaya pit of the Aduy pegmatite field (Urals), p. 28 - 32
Chalcogenide mineralization in the alumina-rich fenites of the Khibiny alkaline complex (Kola Peninsula, Russia), p. 33 - 49
Features of arsenosulvanite from the Lebedinoe deposit, Central Aldan, p. 50 - 59
Sulfide mineralization of the Lebedinoe deposit, Central Aldan, p. 60 - 65
Native gold from Mutnovskoe ore occurrence, South-Eastern Kamchatka, Russia, p. 66 - 71
Monazites of the late granitic pegmatites from Ilmeny mountains: an age chemical dating of zonal and sectorial crytals, p. 72 - 78
To mineralogy of tetravalent uranium, p. 79 - 90
Sulfide-oxide mineral assemblages as indicator of sulfur and oxygen regime in modern submarine massive sulfide deposits, p. 91 - 100
Mineralogical and geochemical features of the uranium ore composition: scientific and practical importance, p. 101 - 111
Crystal Chemistry, Minerals as Prototypes of New Materials, Physical and Chemical Properties of Minerals
Orickite from the Khibiny alkaline complex (Kola Peninsula) and its structure features, p. 113 - 120
Mineralogical Museums and Collections
Fersman Mineralogical Museum exhibit devoted to the 125th anniversary of A.N. Labuntsov, p. 122 - 127
Personalities
To A.N. Labuntsov’s 125th anniversary: A.N. Labuntsov’s letters to academician V.I. Vernadsky (from the Archive of Russian Academy of Sciences), p. 129 - 147
Mineralogical Notes
Intergrowth twins of magnetite in ores of Kurzhunkul deposit, Kazakhstan, p. 149 - 150
Old mistakes in determination of mineral composition, p. 151
Discussion
The essays on fundamental and genetic mineralogy: 5. Mineral species and the metastable mineralization, p. 153 - 165
On 90th anniversary of Ilmeny state conservation area, p. 166 - 167
The new approach to the scientific museums: the “museum orienteering”, p. 168