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tornebohmite

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Journal Article
Published: 24 August 2020
Mineralogical Magazine (2020) 84 (6): 839–853.
...), bastnäsite-(Ce), bastnäsite-(La), ferriallanite-(Ce), ferriallanite-(La), ferriperbøeite-(La), fluorbritholite-(Ce), törnebohmite-(Ce) and törnebohmite-(La). Radekškodaite-(Ce) is associated with ancylite-(Ce), bastnäsite-(Ce), bastnäsite-(La), lanthanite-(La), perbøeite-(Ce) and törnebohmite-(Ce). The new...
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Journal Article
Published: 01 May 2018
European Journal of Mineralogy (2018) 30 (3): 537–544.
...). The mineral occurs in direct contact with ferriallanite-(Ce), cerite-(Ce) and törnebohmite-(Ce). In the type specimen, ferriperbøeite-(Ce) forms brownish black crystals, and exhibits an irregular to short-prismatic morphology elongated along [0 1 0]. The maximum crystal size is about 500 µm. The mineral...
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Journal Article
Published: 01 January 2014
American Mineralogist (2014) 99 (1): 157–169.
... primary phase; they are associated with allanite-(Ce), bastnäsite-(Ce), and intimately inter- or overgrown by törnebohmite-(Ce). Sub- to euhedral crystals, up to 400 μm in size, are chemically zoned between two near-end-member compositions that imply the existence of two new members of the polysomatic...
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Journal Article
Published: 01 October 1982
American Mineralogist (1982) 67 (9-10): 1021–1028.
...Shen Jinchuan; Paul Brian Moore Abstract Tornebohmite, RE 2 Al(OH)[SiO 4 ] 2 , monoclinic, a = 7.383(3), b = 5.673(3), c = 16.937(6)Å, β = 112.04(2)°, Z = 4, space group P 2 1 / c , is structurally allied to the brackebuschite and pyrobelonite groups of minerals. It is isostructural with fornacite...
Image
SEM-BSE images showing minute lamellae of <span class="search-highlight">törnebohmite</span>-(Ce) (light grey, bl...
Published: 01 January 2019
Fig. 4 SEM-BSE images showing minute lamellae of törnebohmite-(Ce) (light grey, black arrow) intergrown with lamellae of a member of the perbøeite-(Ce)–alnaperbøeite-(Ce) solid solution (dark grey, red arrow) in the samples from Stetind (Tysfjord, Norway). Intermediate grey lamellae likely
Image
( a ) Cut and polished section of nodule showing zones of light yellow perc...
Published: 22 October 2020
Fig. 1. ( a ) Cut and polished section of nodule showing zones of light yellow percleveite-(La) intergrown with orange-brown bastnäsite/hydroxylbastnäsite and fluorbritholite-(Ce), black allanite/ferriallanite and greenish törnebohmite. Size of sample: 0.6 cm × 0.4 cm, specimen no. ML 89-2; ( b
Journal Article
Published: 22 October 2020
Mineralogical Magazine (2020) 84 (6): 913–920.
...Fig. 1. ( a ) Cut and polished section of nodule showing zones of light yellow percleveite-(La) intergrown with orange-brown bastnäsite/hydroxylbastnäsite and fluorbritholite-(Ce), black allanite/ferriallanite and greenish törnebohmite. Size of sample: 0.6 cm × 0.4 cm, specimen no. ML 89-2; ( b...
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Image
( a ) Polished section of nodule showing zones of: (1) dark brown alexkuzne...
Published: 03 August 2021
törnebohmite-(La). Size of sample: 1.6 cm × 2.3 cm, specimen no. ML 89-2. ( b ) Fragment of ( a ): alexkuznetsovite-(La) (Alx) associated with percleveite-(La) (Prc), törnebohmite-(La) (Tnb) and bastnäsite-(La) (Bst). Black grains are quartz. Polished section. SEM (back-scattered electron) image. Scale bar = 1
Journal Article
Published: 15 May 2020
Mineralogical Magazine (2020) 84 (4): 593–607.
... and perbøeite-(La) (CaLa 3 )(Al 3 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 3 O(OH) 2 . Both minerals occur in polymineralic nodules and are associated with one another and allanite-(Ce), allanite-(La), bastnäsite-(Ce), bastnäsite-(La), ferriallanite-(Ce), ferriallanite-(La), ferriperbøeite-(Ce), perbøeite-(Ce), törnebohmite...
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Journal Article
Published: 01 January 2019
European Journal of Mineralogy (2019) 31 (1): 173–181.
...Fig. 4 SEM-BSE images showing minute lamellae of törnebohmite-(Ce) (light grey, black arrow) intergrown with lamellae of a member of the perbøeite-(Ce)–alnaperbøeite-(Ce) solid solution (dark grey, red arrow) in the samples from Stetind (Tysfjord, Norway). Intermediate grey lamellae likely...
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Biraite-(La) (Bir) associated with <span class="search-highlight">törnebohmite</span>-(La) (Tnb), fluorbritholite...
Published: 03 August 2021
Fig. 3. Biraite-(La) (Bir) associated with törnebohmite-(La) (Tnb), fluorbritholite-(Ce) (Brt), percleveite-(Ce)/-(La) (Prc) and bastnäsite-(Ce) (Bst). Black grains are quartz. Specimen no. ML 79-2. Polished section. SEM (back-scattered electron) image. Scale bar = 1 mm.
Image
Alexkuznetsovite-(Ce) (Alx) associated with <span class="search-highlight">törnebohmite</span>-(La) (Tnb), fluorb...
Published: 03 August 2021
Fig. 2. Alexkuznetsovite-(Ce) (Alx) associated with törnebohmite-(La) (Tnb), fluorbritholite-(Ce) (Brt), bastnäsite-(Ce) (Bst) and thorite (Trt). Black grains are quartz. Specimen no. ML 88-2. Polished section. SEM (backscattered electron) image. Scale bar = 0.5 mm.
Journal Article
Published: 01 October 2015
American Mineralogist (2015) 100 (10): 2123–2140.
... by a black, typically millimeter-thick allanite-(Ce) rim, with minor monazite-(Ce) in the inner part of that rim. Bastnäsite-(Ce), törnebohmite-(Ce), and cerite-(Ce) appear in a thin intermediate zone between core and rim, often just a few hundreds of micrometers wide. Electron microprobe analyses show...
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( a ) La+Ce vs. (Other REE)+Ca+Mg+Th+U variation in <span class="search-highlight">törnebohmite</span>-(Ce). ( b ...
Published: 01 October 2015
Figure 11 ( a ) La+Ce vs. (Other REE)+Ca+Mg+Th+U variation in törnebohmite-(Ce). ( b ) Y+REE vs. Ca+Mg+Sr variation in cerite-(Ce). ( c ) Ce-La-Nd ternary diagram for bastnäsite-(Ce) analyses. Variations of ( d ) Si vs. P and ( e ) Y+REE vs. Ca+Fe+Sr+Mg in fluorbritholite-(Ce).
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MicroCT-scan image of a crystal of ferriperbøeite-(Ce) (blue) intergrown wi...
Published: 01 May 2018
Fig. 2 MicroCT-scan image of a crystal of ferriperbøeite-(Ce) (blue) intergrown with törnebohmite-(Ce) (green).
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The aluminosilicate chains in schlüterite-(Y), <span class="search-highlight">törnebohmite</span>-(Ce), allanite-...
Published: 01 April 2013
F ig . 6. The aluminosilicate chains in schlüterite-(Y), törnebohmite-(Ce), allanite-(Ce) and gatelite-(Ce); legend as in Fig. 4 .
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Backscattered electron image of perbøeite-(Ce) (medium gray) and törnebohmi...
Published: 01 January 2014
Figure 2 Backscattered electron image of perbøeite-(Ce) (medium gray) and törnebohmite-(Ce) (light gray) intergrowths within a matrix of yttrian fluorite (dark gray). Sample ST4, Stetind.
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Comparative data for the members of the gatelite group.               Miner...
Published: 15 May 2020
) T module composition Törnebohmite-(La) Törnebohmite-(La) Törnebohmite-(Ce) Törnebohmite-(Ce) Törnebohmite-(Ce) Crystal system Monoclinic Monoclinic Monoclinic Monoclinic Monoclinic Space group P 2 1 / m P 2 1 / m P 2 1 / m P 2 1 / m P 2 1 / a a (Å) 8.9458(2
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Crystal structure of gatelite-group minerals seen as a regular alternation ...
Published: 01 January 2019
Fig. 1 Crystal structure of gatelite-group minerals seen as a regular alternation of (001) epidote-type slabs ( E ) and (−102) törnebohmite-type slabs ( T ). Unit cell corresponds to that of gatelite-(Ce) ( P 2 1 / a ).
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The crystal structure of both radekškodaite-(La) and radekškodaite-(Ce). Si...
Published: 24 August 2020
Fig. 6. The crystal structure of both radekškodaite-(La) and radekškodaite-(Ce). SiO 4 tetrahedra are red. H atoms of OH groups are shown as small blue circles. Alternation of epidote-type slabs ( E ) and törnebohmite-type slabs ( T ) is shown. The unit cell is outlined.