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Antandrokomby Pegmatite

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Journal Article

LONDONITE, A NEW MINERAL SPECIES: THE Cs-DOMINANT ANALOGUE OF RHODIZITE FROM THE ANTANDROKOMBY GRANITIC PEGMATITE, MADAGASCAR

William B. Simmons, Federico Pezzotta, Alexander U. Falster, Karen L. Webber
Published: 01 June 2001
The Canadian Mineralogist (2001) 39 (3): 747–755.
DOI: https://doi.org/10.2113/gscanmin.39.3.747
...William B. Simmons; Federico Pezzotta; Alexander U. Falster; Karen L. Webber Abstract Londonite, (Cs,K,Rb) Al 4 Be 4 (B,Be) 12 O 28 , is the Cs-dominant analogue of rhodizite. It occurs with rhodizite at Antandrokomby, a dike of granitic pegmatite in the Manandona valley, Antsirabe region...
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Hydrokenopyrochlore, (□,#) 2 Nb 2 O 6 ·H 2 O, a new species of the pyrochlore supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar

Cristian Biagioni, Nicolas Meisser, Fabrizio Nestola, Marco Pasero, Martin Robyr, Philippe Roth, Cédric Schnyder, Reto Gieré
Published: 01 July 2018
European Journal of Mineralogy (2018) 30 (4): 869–876.
DOI: https://doi.org/10.1127/ejm/2018/0030-2761
...Cristian Biagioni; Nicolas Meisser; Fabrizio Nestola; Marco Pasero; Martin Robyr; Philippe Roth; Cédric Schnyder; Reto Gieré The new mineral species hydrokenopyrochlore, ideally A (□,#) 2 B Nb 2 X O 6 · Y H 2 O, has been discovered in the Antandrokomby pegmatite, Sahatany Pegmatite Field...
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Includes: Supplemental Content
Image
Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Published: 01 June 2001
F ig . 2. Color photographs of the londonite crystals. A. A pale yellow-green crystal of londonite on saccharoidal albite from the Antandrokomby pegmatite, Madagascar. The crystal is 0.7 cm across and shows dodecahedron {110}, tristetrahedron {211}, and tetrahedron {111} faces (photo by R
Image
Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Published: 01 June 2001
F ig . 2. Color photographs of the londonite crystals. A. A pale yellow-green crystal of londonite on saccharoidal albite from the Antandrokomby pegmatite, Madagascar. The crystal is 0.7 cm across and shows dodecahedron {110}, tristetrahedron {211}, and tetrahedron {111} faces (photo by R
Image
Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Published: 01 June 2001
F ig . 2. Color photographs of the londonite crystals. A. A pale yellow-green crystal of londonite on saccharoidal albite from the Antandrokomby pegmatite, Madagascar. The crystal is 0.7 cm across and shows dodecahedron {110}, tristetrahedron {211}, and tetrahedron {111} faces (photo by R
Image
Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Color photographs of the londonite crystals. A. A pale yellow-green crystal...

Published: 01 June 2001
F ig . 2. Color photographs of the londonite crystals. A. A pale yellow-green crystal of londonite on saccharoidal albite from the Antandrokomby pegmatite, Madagascar. The crystal is 0.7 cm across and shows dodecahedron {110}, tristetrahedron {211}, and tetrahedron {111} faces (photo by R
Image
Back-scattered electron images of heterogeneities in londonite–rhodizite fr...

Back-scattered electron images of heterogeneities in londonite–rhodizite fr...

Published: 01 June 2001
F ig . 3. Back-scattered electron images of heterogeneities in londonite–rhodizite from samples collected in pegmatites in central Madagascar. Brightness correlates with increasing Cs content. Scale bar represents 50 μm in A, 100 μm in B and D, and 500 μm in C. A. Feathery exsolution-induced
Image
Map showing locations of londonite–rhodizite-bearing <span class="search-highlight">pegmatites</span> in the Beta...

Map showing locations of londonite–rhodizite-bearing pegmatites in the Beta...

Published: 01 June 2001
F ig . 1. Map showing locations of londonite–rhodizite-bearing pegmatites in the Betafo–Antsirabe region, Madagascar. The numbers refer to the following: 1) Antandrokomby, 2) Andasy, 3) Besesitra, 4) Ifasina, 5) Fiakarandava, 6) Antsongombato, 7) Ampanivana, 8) Manjaka, and 9) Ambalalehifotsy.
Journal Article

New minerals and nomenclature modifications approved in 2017

U. Hålenius, F. Hatert, M. Pasero, S. J. Mills
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 737–742.
DOI: https://doi.org/10.1180/minmag.2017.081.039
...., Belakovskiy, D.I., Britvin, S.N., Voudouris, P., Magganas, A. and Stergiou, V. (2017) Katerinopoulosite, IMA 2017-004. CNMNC Newsletter No. 37, June 2017, page 739; Mineralogical Magazine , 81 , 737–742. IMA No. 2017-005 Hydrokenopyrochlore □ 2 Nb 2 O 4 (OH) 2 (H 2 O) Antandrokomby...
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NEW MINERAL NAMES

John L. Jambor, Andrew C. Roberts
Published: 01 February 2002
American Mineralogist (2002) 87 (2-3): 355–358.
... Mineralogie und Kristallchemie, Universität Stuttgart, Germany. J.L.J. W.B. Simmons, F. Pezzotta, A.U. Falster, K.L. Webber (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Can. Mineral., 39, 747–755...
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New Minerals and Nomenclature Modifications Approved in 2017

Ulf Hålenius, Frédéric Hatert, Marco Pasero, Stuart J. Mills
Published: 01 June 2017
European Journal of Mineralogy (2017) 29 (3): 529–533.
DOI: https://doi.org/10.1127/ejm/2017/0029-2662
.... CNMNC Newsletter No. 37, June 2017, page 530; European Journal of Mineralogy , 29 , 529–533. IMA No. 2017-005 Hydrokenopyrochlore □ 2 Nb 2 O 4 (OH) 2 (H 2 O) Antandrokomby pegmatite, near Mt. Ibity, Sahatany Pegmatite Field, Manandona Valley, Vakinankaratra Region, Antananarivo...
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LONDONITE FROM THE URALS, AND NEW ASPECTS OF THE CRYSTAL CHEMISTRY OF THE RHODIZITE–LONDONITE SERIES

Igor V. Pekov, Olga V. Yakubovich, Werner Massa, Nikita V. Chukanov, Natalia N. Kononkova, Atali A. Agakhanov, Vladimir Yu. Karpenko
Published: 01 April 2010
The Canadian Mineralogist (2010) 48 (2): 241–254.
DOI: https://doi.org/10.3749/canmin.48.2.241
... the Antandrokomby pegmatite, Manandona valley, Betafo Department, and gave: Li 2 O 7.30, Na 2 O 3.30, (K 2 O+Rb 2 O+Cs 2 O) 5.90, BeO 10.10, Al 2 O 3 30.50, B 2 O 3 40.60, SiO 2 1.36, LOI 0.45, total 99.51 wt.% ( Lacroix 1910 ). Duparc et al. (1911) analyzed rhodizite from the Manjaka pegmatite, Sahatany...
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POLLUCITE AND THE CESIUM-DOMINANT ANALOGUE OF POLYLITHIONITE AS EXPRESSIONS OF EXTREME Cs ENRICHMENT IN THE YICHUN TOPAZ–LEPIDOLITE GRANITE, SOUTHERN CHINA

Ru Cheng Wang, Huan Hu, Ai Cheng Zhang, Xiao Long Huang, Pei Ni
Published: 01 June 2004
The Canadian Mineralogist (2004) 42 (3): 883–896.
DOI: https://doi.org/10.2113/gscanmin.42.3.883
... described in the Nanping rare-element granitic pegmatite in southern China ( Yang et al. 1988 , Ni & Hughes 1996 ). Simmons et al. (2001) have recently described the new species londonite from the Antandrokomby granitic pegmatite, in Madagascar; it is the Cs-dominant analogue of rhodizite...
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Journal Article

Mn-bearing purplish-red tourmaline from the Anjanabonoina pegmatite, Madagascar

Ferdinando Bosi, Beatrice Celata, Henrik Skogby, Ulf Hålenius, Gioacchino Tempesta, Marco E. Ciriotti, Erica Bittarello, Alessandra Marengo
Published: 01 March 2021
Mineralogical Magazine (2021) 85 (2): 242–253.
DOI: https://doi.org/10.1180/mgm.2021.20
... W.B. and Falster A.U. ( 2002 ) Tourmaline from the Antandrokomby and Fianarantsoa Pegmatites, Madagascar . Mineralogical Record , 33 , 82 . Watenphul A. , Burgdorf M. , Schlüter J. , Horn I. , Malcherek T. and Mihailova B. ( 2016a ) Exploring...
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A Tribute To William B. “skip” Simmons and Karen Louise Webber

Alexander U. Falster, Pietro Vignola
Published: 01 July 2016
The Canadian Mineralogist (2016) 54 (4): 793–802.
DOI: https://doi.org/10.3749/canmin.INT005
...: The Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar . Canadian Mineralogist 39 , 747 – 755 . Simmons, W.B, Pezzotta, F., Shigley, J.E...
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Cesiokenopyrochlore, the First Natural Niobate with an Inverse Pyrochlore Structure

Atali A. Agakhanov, Anatoly V. Kasatkin, Sergey N. Britvin, Oleg I. Siidra, Leonid A. Pautov, Igor V. Pekov, Vladimir Yu. Karpenko
Published: 26 February 2021
The Canadian Mineralogist (2021) 59 (1): 149–157.
DOI: https://doi.org/10.3749/canmin.2000056
... analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar . Canadian Mineralogist 39 , 747 – 755 . Thomas, R., Davidson, P., & Hahn, A. (2008) Ramanite-(Ce) and ramanite-(Rb): New cesium and rubidium pentaborate tetrahydrate minerals identified...
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Journal Article

NEW MINERALS

Joseph A. Mandarino
Published: 01 June 2002
The Canadian Mineralogist (2002) 40 (3): 1001–1020.
DOI: https://doi.org/10.2113/gscanmin.40.3.1001
... County, California. Canadian Mineralogist 86 , 1053 –1058. Locality : The type locality is Antandrokomby granitic pegmatite, near Mt. Ibity, south of the Sahatany Valley, Madagascar. Also from the Ampanivana and Antsongombato pegmatites. Occurrence : In the pocket zone...
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Journal Article

On the crystal chemistry of londonite [(Cs,K,Rb)Al 4 Be 5 B 11 O 28 ]: A single-crystal neutron diffraction study at 300 and 20 K

G. Diego Gatta, Pietro Vignola, Garry J. McIntyre, Valeria Diella
Published: 01 October 2010
American Mineralogist (2010) 95 (10): 1467–1472.
DOI: https://doi.org/10.2138/am.2010.3554
...., Falster, A.U., and Webber, K.L. ( 2001 ) Londonite, a new mineral species: The Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Canadian Mineralogist , 39 , 747 –755. Strunz, H. ( 1938 ) Gitterkonstante und Raumgruppe von Rhodizit. Naturwissenschaften , 26...
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Journal Article

New Mineral Names ,

Dmitriy I. Belakovskiy, Yulia Uvarova
Published: 01 July 2021
American Mineralogist (2021) 106 (7): 1186–1191.
DOI: https://doi.org/10.2138/am-2021-NMN106714
... Academy of Sciences, Moscow, Russia. D.B. (IMA 2017-005), A ☐ 2 B Nb 2 X O 6 · Y H 2 O, has been discovered in the obtained at the mineral show specimen presumably collected at Antandrokomby Li-Cs-Ta type pegmatite (boron-enriched danburite subtype) intruded into dolomitic marbles...
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Book Chapter

GEM-BEARING PEGMATITES

Author(s)
William B. ‘Skip’ Simmons
Book: Geology of Gem Deposits Second Edition
Series: Short Courses
Publisher: Mineralogical Association of Canada
Published: 01 January 2014
DOI: 10.3749/9780921294696.ch09
EISBN: 978-0-921294-69-6
... pocket indicator. As an example, a large pocket at the Antandrokomby pegmatite, Madagascar, heralded its presence by more and more intensely altered feldspars (which were actually showing effects of tourmalinization) combined with a radial fracture system that converged at the pocket. Appearance...
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