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Journal Article

THE CRYSTAL STRUCTURE OF ARAPOVITE, U 4+ (Ca,Na) 2 (K 1– x □ x ) [Si 8 O 20 ], x ≈ 0.5, A NEW MINERAL SPECIES OF THE STEACYITE GROUP FROM THE DARA-I-PIOZ MORAINE, TIEN-SHAN MOUNTAINS, TAJIKISTAN Available to Purchase

Yulia A. Uvarova, Elena Sokolova, Frank C. Hawthorne, Atali A. Agakhanov, Leonid A. Pautov
Published: 01 August 2004
The Canadian Mineralogist (2004) 42 (4): 1005–1011.
DOI: https://doi.org/10.2113/gscanmin.42.4.1005
... 8 O 20 (H 2 O) n , et celle de la steacyite, Th (Na,Ca) 2 (K 1– x □ x ) Si 8 O 20 , x ≈ 0.5. Nous évaluons la topologie des minéraux silicatés ayant des modules [Si 8 O 20 ]8–, y inclus l’ékanite, Th Ca 2 Si 8 O 20 , et la litidionite, Na 2 K 2 Cu 2 Si 8 O 20 . (Traduit par la Rédaction...
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View PDF for article title, THE CRYSTAL STRUCTURE OF ARAPOVITE, U 4+ (Ca,Na) 2 (K 1– x □ x ) [Si 8 O 20 ], x ≈ 0.5, A NEW MINERAL SPECIES OF THE <span class="search-highlight">STEACYITE</span> GROUP FROM THE DARA-I-PIOZ MORAINE, TIEN-SHAN MOUNTAINS, TAJIKISTAN
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Journal Article

Steacyite, a new name, and a re-evaluation of the nomenclature of "ekanite"-group minerals Available to Purchase

Guy Perrault, J. T. Szymanski
Published: 01 February 1982
The Canadian Mineralogist (1982) 20 (1): 59–63.
View PDF for article title, <span class="search-highlight">Steacyite</span>, a new name, and a re-evaluation of the nomenclature of &quot;ekanite&quot;-group minerals
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Photoluminescence spectra of turkestanite (1) and steacyite (2) under 405 nm excitation. Excitation spectra of uranyl ions (UO2)2+ in turkestanite (3) and steacyite (4) monitored at 520 nm. All spectra were measured at 90 K.

Photoluminescence spectra of turkestanite (1) and steacyite (2) under 405 n... Available to Purchase

Published: 19 January 2023
Fig. 6. Photoluminescence spectra of turkestanite (1) and steacyite (2) under 405 nm excitation. Excitation spectra of uranyl ions (UO 2 ) 2+ in turkestanite (3) and steacyite (4) monitored at 520 nm. All spectra were measured at 90 K.
Journal Article

Major- and trace-element composition of REE -rich turkestanite from peralkaline granites of the Morro Redondo Complex, Graciosa Province, south Brazil Available to Purchase

F. C. J. Vilalva, S. R. F. Vlach
Published: 01 August 2010
Mineralogical Magazine (2010) 74 (4): 645–658.
DOI: https://doi.org/10.1180/minmag.2010.074.4.645
...F. C. J. Vilalva; S. R. F. Vlach Abstract Turkestanite, a rare Th- and REE -bearing cyclosilicate in the ekanite–steacyite group was found in evolved peralkaline granites from the Morro Redondo Complex, south Brazil. It occurs with quartz, alkali feldspar and an unnamed Y-bearing silicate. Electron...
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View PDF for article title, Major- and trace-element composition of REE -rich turkestanite from peralkaline granites of the Morro Redondo Complex, Graciosa Province, south Brazil
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Cationic REE-Ca-Na diagram for the ekanite–steacyite mineral group showing the main coupled substitution mechanisms operating in our turkestanite data set. These substitutions (substitutions 3–5) are also represented as binary cationic diagrams: Ca2+ + REE3+vs. Th4+ + Na+ (substitution 3); Na+ + REE3+vs. 2 Ca2+ (substitution 4) and K+ + BNa+ + 2 REE3+vs. 2 Ca2+ + Th4+ + □. Ekanite–steacyite group mineral data from other localities – Turkestanite data: (1) Dara-i-Pioz Complex (Pautov et al., 1997); (2) Dara-i-Pioz Complex (Reguir and Chakhmouradian, 1999); (3) Jelisyiski Massif, Dzhelizu Complex (Pautov et al., 1997); (4) Central Asia (Ginzburg et al., 1965 as cited by Perrault and Szymański, 1982). Arapovite data: (5) Dara-i-Pioz Complex (Agakhanov et al., 2004). Iraqite data: (6) Shakhi-Rash Mountain, Iraq (Livingstone et al., 1976). Steacyite data: (7) Mont St. Hilaire (Richard and Perrault, 1972); (8) Central Asia (Ginzburg et al., 1965 as cited by Perrault and Szymański, 1982); (9) Rouman Isle (Parodi and Della Ventura, 1987).

Cationic REE -Ca-Na diagram for the ekanite–steacyite mineral group showin... Available to Purchase

Published: 01 August 2010
F ig . 4. Cationic REE -Ca-Na diagram for the ekanite–steacyite mineral group showing the main coupled substitution mechanisms operating in our turkestanite data set. These substitutions (substitutions 3–5) are also represented as binary cationic diagrams: Ca 2+ + REE 3 + vs . Th 4+ + Na
Image
Cationic Na-Ca-K diagram for the ekanite–steacyite group. Symbols as in Fig. 4.

Cationic Na-Ca-K diagram for the ekanite–steacyite group. Symbols as in Fi... Available to Purchase

Published: 01 August 2010
F ig . 9. Cationic Na-Ca-K diagram for the ekanite–steacyite group. Symbols as in Fig. 4 .
Journal Article

ROUMAITE, (Ca,Na,□) 3 (Ca,REE,Na) 4 (Nb,Ti)[Si 2 O 7 ] 2 (OH)F 3 , FROM ROUMA ISLAND, LOS ARCHIPELAGO, GUINEA: A NEW MINERAL SPECIES RELATED TO DOVYRENITE Available to Purchase

Cristian Biagioni, Elena Bonaccorsi, Stefano Merlino, Gian Carlo Parodi, Natale Perchiazzi, Vincent Chevrier, Danilo Bersani
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 17–28.
DOI: https://doi.org/10.3749/canmin.48.1.17
... syenites on Rouma Island, in the Los Archipelago, in Guinea; associated minerals are aegirine, albite, analcime, arfvedsonite, catapleiite, a eudialyte-group member, microcline, sodalite, sphalerite, steacyite and villiaumite. Roumaite is monoclinic, space group Cc , with cell parameters a 7.473(2), b...
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Journal Article

JOHNSENITE-(Ce): A NEW MEMBER OF THE EUDIALYTE GROUP FROM MONT SAINT-HILAIRE, QUEBEC, CANADA Available to Purchase

Joel D. Grice, Robert A. Gault
Published: 01 February 2006
The Canadian Mineralogist (2006) 44 (1): 105–115.
DOI: https://doi.org/10.2113/gscanmin.44.1.105
..., stillwellite-(Ce), titanite, cerite-(Ce), tuperssuatsiaite, steacyite, catapleiite, zakharovite, natrolite and microcline. It is transparent to translucent with a vitreous luster and white streak. It is brittle with a Mohs hardness of 5–6. It has no discernable cleavage or parting and an uneven fracture...
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View PDF for article title, JOHNSENITE-(Ce): A NEW MEMBER OF THE EUDIALYTE GROUP FROM MONT SAINT-HILAIRE, QUEBEC, CANADA
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Journal Article

HAINEAULTITE, A NEW HYDRATED SODIUM CALCIUM TITANOSILICATE FROM MONT SAINT-HILAIRE, QUEBEC: DESCRIPTION, STRUCTURE DETERMINATION AND GENETIC IMPLICATIONS Available to Purchase

Andrew M. McDonald, George Y. Chao
Published: 01 June 2004
The Canadian Mineralogist (2004) 42 (3): 769–780.
DOI: https://doi.org/10.2113/gscanmin.42.3.769
..., prismatic crystals, or fan-like aggregates of more tabular crystals, elongate along [001], with a maximum length of 6 mm. Associated minerals include pectolite, fluorapophyllite, vesuvianite, tainiolite, albite (pink), fluorite, calcite, microcline, aegirine and, to a lesser extent, analcime, steacyite...
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Grey tabular prismatic crystals composed of natromelansonite and melansonite on a beige aggregate of a poorly diffracting clay mineral and steacyite microcrystals. Specimen CMNMC 90813. Photo: François Génier.

Grey tabular prismatic crystals composed of natromelansonite and melansonit... Available to Purchase

Published: 15 January 2024
Figure 1. Grey tabular prismatic crystals composed of natromelansonite and melansonite on a beige aggregate of a poorly diffracting clay mineral and steacyite microcrystals. Specimen CMNMC 90813. Photo: François Génier.
Journal Article

A structure hierarchy for silicate minerals: sheet silicates — CORRIGENDUM Available to Purchase

Frank C. Hawthorne, Yulia A. Uvarova, Elena Sokolova
Published: 01 February 2025
Mineralogical Magazine (2025) 89 (1): 189.
DOI: https://doi.org/10.1180/mgm.2025.13
...) structure hierarchy sheet-silicate minerals structural connectivity stoichiometry plane nets oikodoméic operations corrigendum Table 5 of Hawthorne et al. (2019) lists five minerals: arapovite, ekanite, iraqite-(La), steacyite and turkestanite, as belonging to the ekanite group, with a sheet...
View PDF for article title, A structure hierarchy for silicate minerals: sheet silicates — CORRIGENDUM
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Single and double n-membered silicate rings in minerals: n = 3: (a) benitoite and (b) moskvinite-(Y); n = 4: (c) taramellite and (d) steacyite; n = 6: (e) beryl and (f) milarite.

Single and double n -membered silicate rings in minerals: n = 3: (a) ben... Available to Purchase

Published: 01 April 2003
F ig . 4. Single and double n -membered silicate rings in minerals: n = 3: (a) benitoite and (b) moskvinite-(Y); n = 4: (c) taramellite and (d) steacyite; n = 6: (e) beryl and (f) milarite.
Journal Article

Natromelansonite, Na 3 Zr[Si 7 AlO 19 ]⋅4–5H 2 O, a new member of the rhodesite mero-plesiotype series from Mont Saint-Hilaire, Quebec, Canada Available to Purchase

Inna Lykova, Ralph Rowe, Glenn Poirier, Henrik Friis, Stephanie Barnes
Published: 15 January 2024
Mineralogical Magazine (2024) 88 (2): 195–202.
DOI: https://doi.org/10.1180/mgm.2024.1
...Figure 1. Grey tabular prismatic crystals composed of natromelansonite and melansonite on a beige aggregate of a poorly diffracting clay mineral and steacyite microcrystals. Specimen CMNMC 90813. Photo: François Génier. ...
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View PDF for article title, Natromelansonite, Na 3 Zr[Si 7 AlO 19 ]⋅4–5H 2 O, a new member of the rhodesite mero-plesiotype series from Mont Saint-Hilaire, Quebec, Canada
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Journal Article

Crystal chemistry of turkestanite, Dara-i-Pioz massif, Tajikistan Available to Purchase

Ekaterina Kaneva, Tatiana Radomskaya, Olga Belozerova, Roman Shendrik
Published: 19 January 2023
Mineralogical Magazine (2023) 87 (2): 252–261.
DOI: https://doi.org/10.1180/mgm.2023.3
...Fig. 6. Photoluminescence spectra of turkestanite (1) and steacyite (2) under 405 nm excitation. Excitation spectra of uranyl ions (UO 2 ) 2+ in turkestanite (3) and steacyite (4) monitored at 520 nm. All spectra were measured at 90 K. ...
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Cationic 2 BNa+ + K+ + REE3+vs. 3 Ca2+ + □ diagrams for turkestanite. (a) Major coupled substitution mechanism operating in our turkestanite data set. (b) Selected analyses of turkestanite from Papanduva Pluton and turkestanite, steacyite and iraqite compositions from other localities worldwide. Symbols as in Fig. 4.

Cationic 2 B Na + + K + + REE 3 + vs . 3 Ca 2+ + □ diagrams for tur... Available to Purchase

Published: 01 August 2010
F ig . 5. Cationic 2 B Na + + K + + REE 3 + vs . 3 Ca 2+ + □ diagrams for turkestanite. ( a ) Major coupled substitution mechanism operating in our turkestanite data set. ( b ) Selected analyses of turkestanite from Papanduva Pluton and turkestanite, steacyite and iraqite compositions
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Unit cell parameters, polyhedral site populations, and X-ray and EPMA mean ... Available to Purchase

Published: 19 January 2023
Table 6. Unit cell parameters, polyhedral site populations, and X-ray and EPMA mean atomic numbers (electrons, e – ) for the turkestanite studied compared to those reported for turkestanite by Kabalov et al. ( 1998 ), isostructural steacyite (Richard and Perrault, 1972 ) and arapovite
Journal Article

THE CRYSTAL STRUCTURE OF MOSKVINITE-(Y), Na 2 K (Y, REE ) [Si 6 O 15 ], A NEW SILICATE MINERAL WITH [Si 6 O 15 ] THREE-MEMBERED DOUBLE RINGS FROM THE DARA-I-PIOZ MORAINE, TIEN-SHAN MOUNTAINS, TAJIKISTAN Available to Purchase

Elena Sokolova, Frank C. Hawthorne, Atali A. Agakhanov, Leonid A. Pautov
Published: 01 April 2003
The Canadian Mineralogist (2003) 41 (2): 513–520.
DOI: https://doi.org/10.2113/gscanmin.41.2.513
...F ig . 4. Single and double n -membered silicate rings in minerals: n = 3: (a) benitoite and (b) moskvinite-(Y); n = 4: (c) taramellite and (d) steacyite; n = 6: (e) beryl and (f) milarite. ...
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View PDF for article title, THE CRYSTAL STRUCTURE OF MOSKVINITE-(Y), Na 2 K (Y, REE ) [Si 6 O 15 ], A NEW SILICATE MINERAL WITH [Si 6 O 15 ] THREE-MEMBERED DOUBLE RINGS FROM THE DARA-I-PIOZ MORAINE, TIEN-SHAN MOUNTAINS, TAJIKISTAN
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Selected bond distances (Å) for tetrahedra and polyhedra angles (°) for the... Available to Purchase

Published: 19 January 2023
Table 5. Selected bond distances (Å) for tetrahedra and polyhedra angles (°) for the studied turkestanite sample compared with those of turkestanite (Kabalov et al. , 1998 , Rietveld method), steacyite (Richard and Perrault, 1972 ), arapovite (Uvarova et al. , 2004 ), ekanite (Szymański et
Journal Article

High-temperature behaviour of fedorite, Na 2.5 (Ca 4.5 Na 2.5 )[Si 16 O 38 ]F 2 ⋅2.8H 2 O, from the Murun Alkaline Complex, Russia Available to Purchase

Maria Lacalamita, Ernesto Mesto, Ekaterina Kaneva, Roman Shendrik, Tatiana Radomskaya, Emanuela Schingaro
Published: 11 May 2023
Mineralogical Magazine (2023) 87 (4): 542–553.
DOI: https://doi.org/10.1180/mgm.2023.31
... Irkutskiy and Yakutskiy districts is associated with charoite mineralisation. Mineral associations are as follow: aegirine–apatite–rutile–fedorite–pyrite–galena–quartz (Gavrilovskaya zone); apatite–fedorite–microcline–steacyite–quartz–charoite (Yakutskiy district); aegirine–tinaksite–galena–copper–fedorite...
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Ores and Minerals of Rare Earths, Thorium and Uranium (Lanthanides and Actinides).: By E.I. Semenov. GEOS, Moscow, Russia, 2001, 307 pages, hardcover, in Russian (ISBN 5-89118-192-4). Available to Purchase

Anton R. Chakhmouradian
Published: 01 February 2002
The Canadian Mineralogist (2002) 40 (1): 257–260.
DOI: https://doi.org/10.2113/gscanmin.40.1.257
... with the contemporary standard. Examples are numerous, and include ferutite (var., davidite), taiyite [var., aeschynite-(Y)], marignacite (obsol., ceriopyrochlore), polymignite (obsol., zircono-lite), weibyeite [obsol., calcio-ancylite-(Ce)], keilhauite (var., titanite), kanaekanite (obsol., turkestanite–steacyite...
View PDF for article title, Ores and Minerals of Rare Earths, Thorium and Uranium (Lanthanides and Actinides).: By E.I. Semenov. GEOS, Moscow, Russia, 2001, 307 pages, hardcover, in Russian (ISBN 5-89118-192-4).
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