Nioboixiolite-(Mn 2+ ),     \(\left( {{\mathbf{N}}{{{\mathbf{b}}}_{{{2 \mathord{\left/ {\vphantom {2 3}} \right. } 3}}}}{\mathbf{Mn}}_{{{1 \mathord{\left/ {\vphantom {1 3}} \right. } 3}}}^{{{\mathbf{2}} + }}} \right){{{\mathbf{O}}}_{{\mathbf{2}}}},\)   a New Ixiolite-Group Mineral from the Malkhan Pegmatite Field, Transbaikal Region, Russia

N. V. Chukanov; Чуканов Д. чл. Н. В.; I. V. Pekov; Пеков И. В.; N. V. Zubkova; Зубкова Н. В.; V. O. Yapaskurt; Япаскурт В. О.; Yu. S. Shelukhina; Шелухина Ю. С.; S. N. Britvin; Бритвин С. Н.; D. Yu. Pushcharovsky; Пущаровский Д. Ю.

doi:10.31857/S0869605523010033

Nioboixiolite-(Mn²⁺), \(\left( {{\mathbf{N}}{{{\mathbf{b}}}_{{{2 \mathord{\left/ {\vphantom {2 3}} \right. } 3}}}}{\mathbf{Mn}}_{{{1 \mathord{\left/ {\vphantom {1 3}} \right. } 3}}}^{{{\mathbf{2}} + }}} \right){{{\mathbf{O}}}_{{\mathbf{2}}}},\) a New Ixiolite-Group Mineral from the Malkhan Pegmatite Field, Transbaikal Region, Russia

Авторлар: Chukanov N.¹^,2, Pekov I.², Zubkova N.², Yapaskurt V.², Shelukhina Y.³, Britvin S.³, Pushcharovsky D.²
Мекемелер:
1. Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS
2. Faculty of Geology, Moscow State University
3. Institute of Earth Sciences, Saint Petersburg State University
Шығарылым: Том CLII, № 1 (2023)
Беттер: 8-17
Бөлім: NEW MINERALS
URL: https://journals.rcsi.science/0869-6055/article/view/136723
DOI: https://doi.org/10.31857/S0869605523010033
EDN: https://elibrary.ru/NFRPRT
ID: 136723

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Аннотация
Авторлар туралы
Әдебиет тізімі
Қосымша файлдар
Статистика

Аннотация

The new ixiolte-group mineral nioboixiolite-(Mn²⁺), ideally \( \left( {{\text{N}}{{{\text{b}}}_{{{2 \mathord{\left/
{\vphantom {2 3}} \right.
} 3}}}}{\text{Mn}}_{{{1 \mathord{\left/
{\vphantom {1 3}} \right.
} 3}}}^{{2 + }}} \right){{{\text{O}}}_{{\text{2}}}}{\text{,}} \) the niobian analogue of ixiolite-(Mn²⁺), was discovered in the Sosedka granitic pegmatite vein, Malkhan pegmatite field, Zabaikalsky Krai (Transbaikal Region), Siberia, Russia. The associated minerals are albite, quartz, microcline, elbaite, beryl, bismuthinite, euxenite-(Y), zircon, rutile, cassiterite, and cannonite. Nioboixiolite-(Mn²⁺) occurs as clusters of dark brown to brown-black prismatic crystals up to 0.8 × 1.5 × 5 mm embedded in albite. The lustre is submetallic to adamantine, and the streak is brown. Cleavage is not observed. The Mohs’ hardness is 4.5–5. Density calculated using the empirical formula is equal to 5.803 g cm^–3. The IR spectrum and reflectance spectra in visible range are given. The chemical composition of nioboixiolite-(Mn²⁺) is (electron microprobe, wt %): MnO 14.94, Sc₂O₃ 1.80, Fe₂O₃ 0.20, Y₂O₃ 1.34, TiO₂ 7.66, ZrO₂ 1.74, SnO₂ 1.01, ThO₂ 0.26, UO₂ 1.44, Nb₂O₅ 42.80, Ta₂O₅ 26.77, total 99.96. The empirical formula is (Nb_1.59\({\text{Mn}}_{{1.04}}^{{2 + }}\)Ta_0.59Ti_0.47Sc_0.13Zr_0.07Y_0.06Sn_0.03U_0.03\({\text{Fe}}_{{0.01}}^{{3 + }}\))_Σ4.02O₈ (Z = 1). The crystal structure was determined using single-crystal X-ray diffraction data and refined to R = 0.0474. The new mineral is isostructural to other ixiolite-group members. Nioboixiolite-(Mn²⁺) is orthorhombic, space group: Pbcn, a = 4.762(2) Å, b = 5.739(1) Å, c = 5.149(1) Å, V = 140.7(1) Å³. The strongest lines of the powder X-ray diffraction pattern [d, Å (I, %) (hkl)] are: 3.662 (29) (110), 2.984 (100) (111), 2.505 (21) (021), 1.775 (21) (130), 1.748 (28) (202), 1.726 (35) (221), 1.553 (20) (113), 1.473 (19) (023), 1.463 (30) (311, 132).

Негізгі сөздер

nioboixiolite-(Mn²⁺), new mineral, ixiolite group, columbite supergroup, crystal structure, Malkhan pegmatite field

Әдебиет тізімі

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