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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...
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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
... of coupled substitution mechanisms involving steacyite, a Na-dominant analogue of turkestanite, iraqite, a REE -bearing end-member in the ekanite–steacyite group, ekanite and some theoretical end-members. Turkestanite crystals were interpreted as having precipitated during post-magmatic stages...
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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
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
...,Ca) 2 (K 1– x □ x ) Si 8 O 20 (H 2 O) n ( Richard & Perrault 1972 , Perrault & Szymánski 1982 ), iraqite-(La), REE (Na,Ca) 2 (K 1– x □ x ) Si 8 O 20 (H 2 O) n ( Livingstone et al. 1976 ), and turkestanite, Th (Ca,Na) 2 (K 1– x □ x ) Si 8 O 20 (H 2 O) n , x...
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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
... also includes steacyite, arapovite and iraqite-(La). The mineral species have doubly folded sheets with the same pattern of u and d tetrahedra. The tetrahedra are shared via vertices and form [Si 8 O 20 ] double four-membered rings ( Fig. 1 ). Fig. 1. (a) The crystal structure of turkestanite...
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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
... □ x ) Si 8 O 20 (H 2 O) n ( Richard & Perrault 1972 , Perrault & Szymánski 1982 ), iraqite-(La), REE (Na,Ca) 2 (K 1– x □ x ) Si 8 O 20 (H 2 O) n ( Livingstone et al. 1976 ), and turkestanite, Th (Ca,Na) 2 (K 1– x □ x ) Si 8 O 20 (H 2 O) n ( Kabalov et al . 1998...
FIGURES
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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
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
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Plane nets and their associated structures. Single Nets Minerals ... Available to Purchase

Published: 01 February 2019
-(Y), ‘hingganite-(Yb)’, ‘calcybeborosilite’, homilite, minasgeraisite-(Y), fluorapophyllite-(K), fluorapophyllite-(Na), hydroxyapophyllite-(K), cavansite, cryptophyllite, shlykovite, mountainite, cuprorivaite, effenbergite, gillespite, wesselsite, arapovite, ekanite, iraqite-(La), steacyite
Journal Article

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

Frank C. Hawthorne, Yulia A. Uvarova, Elena Sokolova
Published: 01 February 2019
Mineralogical Magazine (2019) 83 (1): 3–55.
DOI: https://doi.org/10.1180/mgm.2018.152
...-(Y), ‘hingganite-(Yb)’, ‘calcybeborosilite’, homilite, minasgeraisite-(Y), fluorapophyllite-(K), fluorapophyllite-(Na), hydroxyapophyllite-(K), cavansite, cryptophyllite, shlykovite, mountainite, cuprorivaite, effenbergite, gillespite, wesselsite, arapovite, ekanite, iraqite-(La), steacyite...
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Journal Article

Evolution of uranium and thorium minerals Available to Purchase

Robert M. Hazen, Rodney C. Ewing, Dimitri A. Sverjensky
Published: 01 October 2009
American Mineralogist (2009) 94 (10): 1293–1311.
DOI: https://doi.org/10.2138/am.2009.3208
... deposits of thorium occur in the monazite [(REE) PO 4 ] structure type, which includes huttonite [(Th,U)SiO 4 ] and cheralite [(Ce,Ca,Th,U)(P,Si)O 4 ], whereas both Th and U are essential elements in some rare minerals of the pyrochlore, polycrase, rhabdophane, columbite, and iraqite groups ( Staatz 1974...
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Single-layer sheet-silicates based on the 4.8 2 , 4.6.12, (4.6.8) 2 (6.8 2 ... Available to Purchase

Published: 01 February 2019
[4.8 2 ] 8 (u 4 ) 1 (d 4 ) 1 (u 2 d 2 u 2 d 2 ) 2 2F ThCa 2 [Si 4 O 10 ] 2 1:2.50 19 b (22) Iraqite-(La) [4.8 2 ] 8 (u 4 ) 1 (d 4 ) 1 (u 2 d 2 u 2 d 2 ) 2 2F LaCa 2 K [Si 4 O 10 ] 2 1:2.50 “ (23) Steacyite [4.8 2 ] 8 (u 4 ) 1 (d 4 ) 1 (u 2 d 2 u 2 d 2 ) 2
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Structure hierarchy for sheet-silicate minerals. Mineral Formula ... Available to Purchase

Published: 01 February 2019
a Arapovite U 4+ (CaNa)K [Si 4 O 10 ] 2 2.50 [4.8 2 ] 8 2F S 19 b Ekanite ThCa 2 [Si 4 O 10 ] 2 2.50 [4.8 2 ] 8 2F S 19 b Iraqite-(La) LaCa 2 K [Si 4 O 10 ] 2 2.50 [4.8 2 ] 8 2F S 19 b Steacyite Th(CaNa)K [Si 4 O 10 ] 2 2.50 [4.8 2 ] 8
Book Chapter

CHAPTER 3: GEOCHEMICAL CHARACTERISTICS OF URANIUM AND THORIUM AND ANALYTICAL METHODOLOGIES Available to Purchase

Author(s)
Kurt Kyser, Michel Cuney
Book: The Geology and Geochemistry of Uranium and Thorium Deposits
Series: Short Courses
Publisher: Mineralogical Association of Canada
Published: 01 January 2016
DOI: 10.3749/9780921294726.ch03
EISBN: 978-0-921294-72-6
... 13 tetragonal Melanocerite (Ce, Th, Ca) 5 (Si, B) 3 O 12 (OH, F) • nH 2 O 12 trigonal Thalenite Y 3 Si 3 O 10 10.5 monoclinic Iraqite-(La) K(La,Ce,Th) 2 (Ca,Na) 4 (Si,Al) 16 O 40 10 tetragonal Arapovite (U,Th)(Ca,Na) 2 (K 1-x [] x )Si 8 O 20 •H 2 O,x=0.5 9.3 tetragonal...
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