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nioboheftetjernite

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Journal Article

Nioboheftetjernite, ScNbO 4 , a new mineral from the Befanamo Pegmatite, Madagascar Available to Purchase

Inna Lykova, Ralph Rowe, Glenn Poirier, Andrew M. McDonald, Gerald Giester
Published: 25 March 2021
The Canadian Mineralogist (2021) 59 (2): 445–452.
DOI: https://doi.org/10.3749/canmin.2000070
...Inna Lykova; Ralph Rowe; Glenn Poirier; Andrew M. McDonald; Gerald Giester ABSTRACT A new mineral, nioboheftetjernite, ideally ScNbO 4 , was found in the Befanamo pegmatite, Analamanga, Madagascar. It occurs as anhedral grains and very crude elongated crystals up to 200 μm in length...
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Representative compositions of oxides in wt.% and atoms per formula unit * ... Open Access

Published: 01 December 2024
Table 4. Representative compositions of oxides in wt.% and atoms per formula unit * Key: Nhef – nioboheftetjernite; Clb – columbite–(Mn); Fsm – fersmite; Pcl – fluorcalciopyrochlore; Mic – fluorcalciomicrolite (mean of 20 analyses). b.d. = below detection limit. * Nioboheftetjernite
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BSE images of the mineral assemblages. (a) Euhedral zircon associated with columbite-(Mn) and fersmite, fluorcalciomicrolite, thortveitite and titanite. (b) and (c) Corroded relics of columbite replaced by fersmite and overgrown by euhedral crystals of nioboheftetjernite. (d) Complexly altered fluorcalciomicrolite with rare thin bright veinlets of Pb-enriched fluorcalciomicrolite. The microlite fills open spaces in older mineralisation dominated by columbite-(Mn) and fersmite (dark grey). Note the feeder structure connecting two microlite aggregates. (e) Kristiansenite veinlet traversing the columbite-(Mn) + fersmite aggregates. Note also a small brighter crystal of nioboheftetjernite. (f) Oscillatory zoned grain of titanite. Zrn – zircon, Clb – columbite-(Mn), Fsm – fersmite, Mic – fluorcalciomicrolite, Tvt – thortveitite, Ttn – titanite, Kse – kristiansenite, Nhef – nioboheftetjernite.

BSE images of the mineral assemblages. (a) Euhedral zircon associated with ... Open Access

Published: 01 December 2024
Figure 2. BSE images of the mineral assemblages. (a) Euhedral zircon associated with columbite-(Mn) and fersmite, fluorcalciomicrolite, thortveitite and titanite. (b) and (c) Corroded relics of columbite replaced by fersmite and overgrown by euhedral crystals of nioboheftetjernite. (d) Complexly
Journal Article

Importance of Ca-rich fluids for the formation of secondary Sc-minerals. An example from a metaluminous pegmatite Kožichovice II, Czech Republic Open Access

Jakub Výravský, Radek Škoda, Milan Novák
Published: 01 December 2024
Mineralogical Magazine (2024) 88 (6): 787–803.
DOI: https://doi.org/10.1180/mgm.2024.85
...Table 4. Representative compositions of oxides in wt.% and atoms per formula unit * Key: Nhef – nioboheftetjernite; Clb – columbite–(Mn); Fsm – fersmite; Pcl – fluorcalciopyrochlore; Mic – fluorcalciomicrolite (mean of 20 analyses). b.d. = below detection limit. * Nioboheftetjernite...
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Compositional trends involving Sc in (a) and (b) columbite-(Mn); (c) and (d) nioboheftetjernite.

Compositional trends involving Sc in (a) and (b) columbite-(Mn); (c) and (d... Open Access

Published: 01 December 2024
Figure 4. Compositional trends involving Sc in (a) and (b) columbite-(Mn); (c) and (d) nioboheftetjernite.
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REFLECTANCE DATA FOR NIOBOHEFTETJERNITE Available to Purchase

Published: 25 March 2021
TABLE 2. REFLECTANCE DATA FOR NIOBOHEFTETJERNITE
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BOND-VALENCE CALCULATIONS FOR NIOBOHEFTETJERNITE* Available to Purchase

Published: 25 March 2021
TABLE 6. BOND-VALENCE CALCULATIONS FOR NIOBOHEFTETJERNITE*
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SELECTED INTERATOMIC DISTANCES (Å) IN THE STRUCTURE OF NIOBOHEFTETJERNITE Available to Purchase

Published: 25 March 2021
TABLE 5. SELECTED INTERATOMIC DISTANCES (Å) IN THE STRUCTURE OF NIOBOHEFTETJERNITE
Journal Article

New Mineral Names Free

Aaron J. Celestian
Published: 03 April 2023
American Mineralogist (2023) 108 (4): 784–785.
DOI: https://doi.org/10.2138/am-2023-NMN10842
...Aaron J. Celestian Abstract This issue of New Mineral Names provides a summary of five new species: pohlite, muonionalustaite, medvedevite, gysinite-(La), and nioboheftetjernite. Copyright © 2023 by the Mineralogical Society of America 2023 Mineralogical Society of America The readers have...
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CHEMICAL DATA (IN wt.%, AVERAGE OF EIGHT ANALYSES) FOR NIOBOHEFTETJERNITE Available to Purchase

Published: 25 March 2021
TABLE 1. CHEMICAL DATA (IN wt.%, AVERAGE OF EIGHT ANALYSES) FOR NIOBOHEFTETJERNITE
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The Raman spectrum of nioboheftetjernite (green laser, 532 nm).

The Raman spectrum of nioboheftetjernite (green laser, 532 nm). Available to Purchase

Published: 25 March 2021
Fig. 3. The Raman spectrum of nioboheftetjernite (green laser, 532 nm).
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General view of the crystal structure of nioboheftetjernite. The unit cell is outlined.

General view of the crystal structure of nioboheftetjernite. The unit cell ... Available to Purchase

Published: 25 March 2021
Fig. 5. General view of the crystal structure of nioboheftetjernite. The unit cell is outlined.
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COMPARATIVE DATA FOR NIOBOHEFTETJERNITE AND CHEMICALLY RELATED WOLFRAMITE G... Available to Purchase

Published: 25 March 2021
TABLE 8. COMPARATIVE DATA FOR NIOBOHEFTETJERNITE AND CHEMICALLY RELATED WOLFRAMITE GROUP MINERALS
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COMPARISON OF SHAKHDARAITE-(Y), SAMARSKITE-(Y), BROOKITE, IWASHIROITE-(Y), ... Available to Purchase

Published: 25 February 2022
TABLE 8. COMPARISON OF SHAKHDARAITE-(Y), SAMARSKITE-(Y), BROOKITE, IWASHIROITE-(Y), HEFTETJERNITE, AND NIOBOHEFTETJERNITE
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CRYSTAL DATA, DATA COLLECTION INFORMATION, AND STRUCTURE REFINEMENT DETAILS... Available to Purchase

Published: 25 March 2021
TABLE 3. CRYSTAL DATA, DATA COLLECTION INFORMATION, AND STRUCTURE REFINEMENT DETAILS FOR NIOBOHEFTETJERNITE
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Nioboheftetjernite in an intergrowth with ilmenite and euxenite-(Y). Polished section. SEM (BSE) image.

Nioboheftetjernite in an intergrowth with ilmenite and euxenite-(Y). Polish... Available to Purchase

Published: 25 March 2021
Fig. 2 . Nioboheftetjernite in an intergrowth with ilmenite and euxenite-(Y). Polished section. SEM (BSE) image.
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COORDINATES AND EQUIVALENT DISPLACEMENT PARAMETERS ( U eq , Å 2 ) OF ATOMS... Available to Purchase

Published: 25 March 2021
TABLE 4. COORDINATES AND EQUIVALENT DISPLACEMENT PARAMETERS ( U eq , Å 2 ) OF ATOMS AND SITE OCCUPANCIES FOR NIOBOHEFTETJERNITE
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REFINED SITE-SCATTERING FACTORS AND ASSIGNED OCCUPANCIES FOR CATION SITES S... Available to Purchase

Published: 25 March 2021
TABLE 7. REFINED SITE-SCATTERING FACTORS AND ASSIGNED OCCUPANCIES FOR CATION SITES Sc AND Nb IN THE STRUCTURE OF NIOBOHEFTETJERNITE*
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Zigzag chains of edge-sharing Nb- and Sc-centered octahedra in the structure of nioboheftetjernite. The unit cell is outlined.

Zigzag chains of edge-sharing Nb- and Sc-centered octahedra in the structur... Available to Purchase

Published: 25 March 2021
Fig. 4. Zigzag chains of edge-sharing Nb- and Sc-centered octahedra in the structure of nioboheftetjernite. The unit cell is outlined.
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Black nioboheftetjernite with visually indistinguishable rossovskyite, ilmenite, and rutile. FOV 1.2 mm. Specimen CMNMC 51710. Photo: P. Sokoloff and I. Lykova.

Black nioboheftetjernite with visually indistinguishable rossovskyite, ilme... Available to Purchase

Published: 25 March 2021
Fig. 1. Black nioboheftetjernite with visually indistinguishable rossovskyite, ilmenite, and rutile. FOV 1.2 mm. Specimen CMNMC 51710. Photo: P. Sokoloff and I. Lykova.