Fractionation of geochemical twins (Zr/Hf, Nb/Ta and Y/Ho) and HREE-enrichment during magmatic and metamorphic processes in peralkaline nepheline syenites from Norra Kärr (Sweden)
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DOI: 10.1016/j.lithos.2020.105667
Abstract: Abstract The 1.49 Ga Norra Karr complex (Sweden) consists of deformed and metamorphosed peralkaline nepheline syenites that contain eudialyte-group minerals as the major host of high field strength elements and rare earth elements. Earlier studies revealed… read more here.
Keywords: nepheline syenites; magmatic metamorphic; group; eudialyte group ... See more keywords
New Data on Isomorphism in Eudialyte-Group Minerals. I. Crystal Structure of Titanium-Rich Eudialyte from the Kovdor Alkaline Massif
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DOI: 10.1134/s1063774518040223
Abstract: An abnormally titanium-rich mineral of the eudialyte group was studied by IR spectroscopy and X-ray diffraction. The trigonal unit cell parameters are a = 14.165(1) Å, c = 30.600(5) Å, V = 5317.23(4) Å3, sp.… read more here.
Keywords: eudialyte; titanium rich; crystal structure; eudialyte group ... See more keywords
New Data on the Isomorphism in Eudialyte-Group Minerals. V: Crystal Structure of an Intermediate Member of the Manganoeudialyte‒Ilyukhinite Isomorphous Series
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DOI: 10.1134/s1063774520010204
Abstract: Abstract The crystal structure of a high-symmetry representative of the eudialyte group from the Norra Kärr massif (Sweden) has been investigated by X-ray diffraction analysis and IR spectroscopy. The trigonal unit-cell parameters are found to… read more here.
Keywords: new data; crystal structure; eudialyte group; structure ... See more keywords
Ilyukhinite (H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2 ∙ 3H2O, a New Mineral of the Eudialyte Group
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DOI: 10.1134/s1075701517070030
Abstract: A new eudialyte-group mineral, ilyukhinite, ideally (H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2 · 3H2O, has been found in peralkaline pegmatite at Mt. Kukisvumchorr, Khibiny alkaline pluton, Kola Peninsula, Russia. It occurs as brownish orange, with vitreous luster anhedral grains up… read more here.
Keywords: ilyukhinite h3o; 14ca6mn2zr3si26o72 3h2o; eudialyte group; h3o 14ca6mn2zr3si26o72 ... See more keywords
Amableite-(Ce), Na15[(Ce1.5Na1.5)Mn3]Mn2Zr3□Si[Si24O69(OH)3](OH)2⋅H2O, a new eudialyte-group mineral from Saint-Amable Sill, Québec, Canada
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DOI: 10.1180/mgm.2024.26
Abstract: Abstract The new eudialyte-group mineral amableite-(Ce), ideally Na15[(Ce1.5Na1.5)Mn3]Mn2Zr3□Si[Si24O69(OH)3](OH)2⋅H2O, was discovered in a peralkaline pegmatite at Saint-Amable Sill, Montérégie, Québec, Canada. The associated minerals are albite, microcline, aegirine, serandite, natrolite, yofortierite, and an unidentified titanosilicate forming… read more here.
Keywords: ce1; group; na15 ce1; new eudialyte ... See more keywords
Review on the Compositional Variation of Eudialyte-Group Minerals in the Ilímaussaq Complex (South Greenland)
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DOI: 10.3390/min10111011
Abstract: We review the compositional variation of eudialyte-group minerals (EGM) from the Ilimaussaq complex in South Greenland. Investigated samples cover all major rock units and associated pegmatites and aplites. The whole data set (>3000 analyses from… read more here.
Keywords: variation eudialyte; review compositional; complex south; eudialyte group ... See more keywords
Crystal Chemistry of Eudialyte Group Minerals from Rouma Island, Los Archipelago, Guinea
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DOI: 10.3390/min15030249
Abstract: We herein present a comprehensive investigation of the eudialyte group minerals from the nepheline syenites of Rouma Island in the Los Archipelago, Conakry region, Guinea. Two distinct mineral phases were identified: an oneillite-like phase, associated… read more here.
Keywords: chemistry; los archipelago; group; group minerals ... See more keywords