Ferriperbøeite-(Ce), [CaCe3]∑=4[Fe3+Al2Fe2+]∑=4[Si2O7][SiO4]3O(OH)2, a new member of the polysomatic epidote–törnebohmite series from the Nya Bastnäs Fe-Cu-REE deposit, Sweden

Bindi, Luca; Holtstam, Dan; Fantappiè, Giulia; Andersson, Ulf; Bonazzi, Paola

doi:10.1127/ejm/2018/0030-2717

Cited by 3 publications

(4 citation statements)

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“…ferriperbøeite-(Ce) (Bindi et al, 2018) and perbøeite-(Ce) (Bonazzi et al, 2014), respectively, with La as the dominant REE.…”

Section: Mineralogical Contextmentioning

confidence: 99%

“…Ferriperbøeite-(La) [Russian Cyrillic: феррипербёит-(La)], ideally (CaLa 3 )(Fe 3+ Al 2 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 3 O(OH) 2 , and perbøeite-(La) [Russian Cyrillic: пербёит-(La)], ideally (CaLa 3 )(Al 3 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 3 O(OH) 2 are named in accordance with the gatelite supergroup nomenclature scheme (Bonazzi et al , 2019) as analogues of ferriperbøeite-(Ce) (Bindi et al , 2018) and perbøeite-(Ce) (Bonazzi et al , 2014), respectively, with La as the dominant REE .…”

Section: Ferriperbøeite-(la) and Perbøeite-(la)mentioning

confidence: 99%

“…Lower in the hierarchy, the gatelite supergroup is divided into three mineral groups. Ferriperbøeite-(La) and perbøeite-(La) should be included into the gatelite group along with gatelite-(Ce) (CaCe 3 )(Al 3 Mg)[Si 2 O 7 ][SiO 4 ] 3 O(OH) 2 (Bonazzi et al , 2003), perbøeite-(Ce) (CaCe 3 )(Al 3 Fe 2+ )[Si 2 O 7 ](SiO 4 ) 3 O(OH) 2 (Bonazzi et al , 2014) and ferriperbøeite-(Ce) (CaCe 3 )(Fe 3+ Al 2 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 3 O(OH) 2 (Bindi et al , 2018). This group includes members with formulae that can be derived from gatelite-(Ce) solely by homovalent substitutions.…”

Section: Ferriperbøeite-(la) and Perbøeite-(la)mentioning

confidence: 99%

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The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa₃)(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂ and perbøeite-(La), (CaLa₃)(Al₃Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂

Kasatkin

Zubkova

Pekov

et al. 2020

MinMag

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Abstract The paper opens a series devoted to the mineral diversity of the Mochalin Log rare earth element (REE) deposit, South Urals, Russia. There is a brief outline of the history of studies and geology of the deposit as well as the description of two new isostructural gatelite-group minerals, ferriperbøeite-(La) (CaLa3)(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 and perbøeite-(La) (CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(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-(Ce) and törnebohmite-(La). The new minerals form isolated anhedral grains up to 0.3 mm [ferriperbøeite-(La)] and 0.5 mm [perbøeite-(La)] across and granular aggregates up to 1.5 mm × 0.5 mm [ferriperbøeite-(La)] and 3 mm × 1 mm [perbøeite-(La)]. Both minerals are brownish-black with vitreous lustre. Dcalc = 4.510 [ferriperbøeite-(La)] and 4.483 [perbøeite-(La)] g cm–3. They are optically biaxial (+); ferriperbøeite-(La): α = 1.788(5), β = 1.790(5), γ = 1.810(5) and 2Vmeas = 40(10)°; perbøeite-(La): α = 1.778(8), β = 1.783(8), γ = 1.805(8) and 2Vmeas = 40(10)°. Chemical data [wt.%, electron-microprobe; Fe3+:Fe2+ ratio from charge-balance requirements, H2O by stoichiometry; ferriperbøeite-(La)/perbøeite-(La)] are: CaO 4.91/4.81, ThO2 0.00/0.32, La2O3 23.75/22.16, Ce2O3 19.69/20.05, Pr2O3 0.85/1.09, Nd2O3 1.48/2.18, MgO 1.47/1.38, Al2O3 10.68/11.25, MnO 1.07/0.92, FeO 3.04/3.35, Fe2O3 5.31/3.78, TiO2 0.19/0.19, SiO2 27.47/27.35, F 0.11/0.23, H2O 1.61/1.54, –O = F –0.05/–0.10, total 101.58/100.50. The empirical formulae based on O20(OH,F)2 are for ferriperbøeite-(La): (Ca0.95La1.58Ce1.30Nd0.10Pr0.06)Σ3.99(Al2.27Fe3+0.72Fe2+0.46Mg0.40Mn0.16Ti0.03)Σ4.04Si4.96O20[(OH)1.94F0.06]; and for perbøeite-(La): (Ca0.94Th0.01La1.49Ce1.34Nd0.14Pr0.07)Σ3.99(Al2.42Fe3+0.52Fe2+0.51Mg0.38Mn0.14 Ti0.03)Σ4.00Si4.99O20[(OH)1.87F0.13]. Both minerals are monoclinic, P21/m; the unit-cell parameters [ferriperbøeite-(La)/perbøeite-(La)] are: a = 8.9458(2)/8.9652(4), b = 5.72971(13)/5.7306(2), c = 17.6192(3)/17.6770(9) Å, β = 115.9497(19)/116.053(6)°, V = 812.06(3)/815.88(6) Å3 and Z = 2/2. The crystal structures are solved on a single crystal and converged to R = 0.0355 [ferriperbøeite-(La)] and 0.0750 [perbøeite-(La)]. Ferriperbøeite-(La) and perbøeite-(La) are named as the La-analogues of ferriperbøeite-(Ce) and perbøeite-(Ce), respectively.

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“…ferriperbøeite-(Ce) (Bindi et al, 2018) and perbøeite-(Ce) (Bonazzi et al, 2014), respectively, with La as the dominant REE.…”

Section: Mineralogical Contextmentioning

confidence: 99%

Section: Ferriperbøeite-(la) and Perbøeite-(la)mentioning

confidence: 99%

Section: Ferriperbøeite-(la) and Perbøeite-(la)mentioning

confidence: 99%

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The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa₃)(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂ and perbøeite-(La), (CaLa₃)(Al₃Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂

Kasatkin

Zubkova

Pekov

et al. 2020

MinMag

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“…The latter are considered as iso-topological ET type polysomes within a polysomatic series which has epidote-type and törnebohmite-type structures as end-members (Shen and Moore, 1982). Their structures can be described as a regular alternating 1:1 stacking of slabs with the epidote-type structure (E) and slabs with the törnebohmite-type structure (T) (Bonazzi et al , 2003, 2014; Holtstam et al , 2005; Bindi et al , 2018). In the radekškodaite structure, regular alternation of one epidote-type module with two törnebohmite-type modules is observed.…”

Section: Crystal Structurementioning

confidence: 99%

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part II. Radekškodaite-(La), (CaLa₅)(Al₄Fe²⁺)[Si₂O₇][SiO₄]₅O(OH)₃ and radekškodaite-(Ce), (CaCe₅)(Al₄Fe²⁺)[Si₂O₇][SiO₄]₅O(OH)₃, two new minerals with a novel structure-type belonging to the epidote–törnebohmite polysomatic series

Kasatkin

Zubkova

Pekov

et al. 2020

MinMag

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Two new isostructural minerals radekškodaite-(La) (CaLa5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3 and radekškodaite-(Ce) (CaCe5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3 were discovered in polymineralic nodules from the Mochalin Log REE deposit, South Urals, Russia. Radekškodaite-(La) is associated with allanite-(Ce), allanite-(La), 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 minerals form isolated anhedral grains up to 0.35 × 0.75 mm [radekškodaite-(La)] and 1 mm × 2 mm [radekškodaite-(Ce)]. Both minerals are greenish-brown with vitreous lustre. Dcalc = 4.644 [radekškodaite-(La)] and 4.651 [radekškodaite-(Ce)] g cm–3. Both minerals are optically biaxial (+); radekškodaite-(La): α = 1.790(7), β = 1.798(5), γ = 1.825(8) and 2Vmeas = 60(10)°; radekškodaite-(Ce): α = 1.798(6), β = 1.806(6), γ = 1.833(8) and 2Vmeas = 65(10)°. Chemical data [wt.%, electron-microprobe; FeO:Fe2O3 by charge balance; H2O by stochiometry; radekškodaite-(La)/radekškodaite-(Ce)] are: CaO 3.40/2.74, La2O3 27.68/22.23, Ce2O3 20.39/24.30, Pr2O3 0.94/1.48, Nd2O3 1.71/3.18, ThO2 0.23/0.24, MgO 0.85/1.04, Al2O3 10.35/10.84, MnO 0.64/0.69, FeO 2.55/2.76, Fe2O3 3.12/2.57, TiO2 0.13/0.04, SiO2 26.03/26.10, F 0.10/0.09, H2O 1.62/1.63, –O=F –0.04/–0.04, total 99.70/99.89. The empirical formulae based on O28(OH,F)3 are: radekškodaite-(La): (Ca0.98Th0.01La2.75Ce2.01Nd0.16Pr0.09)Σ6.00(Al3.28Fe3+0.63Fe2+0.57Mg0.34Mn0.15Ti0.03)Σ5.00Si7.00O28[(OH)2.91F0.09]; radekškodaite-(Ce): (Ca0.79Mn0.16Th0.01Ce2.39La2.20Nd0.30Pr0.14)Σ5.99(Al3.43Fe2+0.62Fe3+0.52Mg0.42Ti0.01)Σ5.00Si7.00O28[(OH)2.92F0.08]. Both minerals are monoclinic, P21/m; the unit-cell parameters [radekškodaite-(La)/radekškodaite-(Ce)] are: a = 8.9604(3)/8.9702(4), b = 5.7268(2)/5.7044(2), c = 25.1128(10)/25.1642(13) Å, β = 116.627(5)/116.766(6)°, V = 1151.98(7)/1149.68(11) Å3 and Z = 2/2. The crystal structures are solved based on single-crystal X-ray diffraction data; R = 0.0554 [radekškodaite-(La)] and 0.0769 [radekškodaite-(Ce)]. Both minerals belong to the epidote–törnebohmite polysomatic series and represent first members of ET2-type: their structure consists of regular alternating modules, one slab of the epidote (E) structure and two slabs of törnebohmite (T). The rootname radekškodaite is given in honor of the Czech mineralogist Radek Škoda (born 1979), Associate Professor at Masaryk University, Brno, Czech Republic. The suffix-modifier -(La) or -(Ce) indicates the predominance of La or Ce among REE in the mineral.

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Gatelite-supergroup minerals: recommended nomenclature and review

Bonazzi¹,

Holtstam²,

Bindi³

2019

ejm

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All minerals having a crystal structure and a chemical composition that can be described as a regular combination of modules of epidote-type structure (E) and modules of to ¨rnebohmite-type structure (T) fulfil the criteria of forming a mineral supergroup, named the gatelite supergroup. All members share the same general formula and topology, consisting of edge-sharing octahedral chains, cross-linked to each other by SiO 4 and Si 2 O 7 groups, with the remaining large cavities occupied by Ca and REE ± Na. By analogy with the epidote supergroup, three groups are defined to accommodate the existing accepted mineral species: (i) the gatelite group -includes members that can be derived from the mineral gatelite-(Ce) solely by homovalent substitutions, i.e., gatelite-(Ce), perbøeite-(Ce), and ferriperbøeite-(Ce); (ii) the va ¨stmanlandite group -includes members typified by the mineral va ¨stmanlandite-(Ce). This group is derived from gatelite-(Ce) by homovalent substitutions and one coupled heterovalent substitution of the typeis the unique member of this potential group; and (iii) the alnaperbøeite group -includes members typified by the mineral alnaperbøeite-(Ce). This group is derived from gatelite-(Ce) by homovalent substitutions and one coupled heterovalent substitution of the typeis the unique known member of this potential group. We recommend that the nomenclature of the gatelite supergroup be based on the criterion of occupancy of key cation sites. In particular, A1 and M3 (and, in principle, M2) determine the root name. If the dominant cations at A1, M3 (and M2) exactly match those of an approved species, the same fixed root name -modified by an appropriate prefix -is given. If the dominant cation is different at any of these sites, a new root name is assigned.The members of the gatelite supergroup are rare minerals, although the number of occurrences is increasing. They have been found in REE-rich assemblages in a variety of geological settings, including granitic NYF pegmatites, carbonatite and associated fenites, alkali-syenites, and hydrothermal-metasomatic skarns. Most frequently, they coexist with to ¨rnebohmite-( Ce), allanite-or dollaseite-group minerals, bastna ¨site-(Ce), cerite-(Ce), or fluorbritholite-(Ce). Analytical data available from the literature show extensive solid solution along the ferriperbøeite-(Ce)-va ¨stmanlandite-(Ce) and the perbøeite-(Ce)-alnaperbøeite-(Ce) joins, whereas there are few or no samples testifying to va ¨stmanlandite-(Ce)-gatelite-(Ce) or perbøeite-(Ce)-ferriperbøeite-(Ce) solid solutions.The present nomenclature recommendations were approved by the International Mineralogical Association Commission on New Minerals, Nomenclature and Classification.

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Ferriperbøeite-(Ce), [CaCe3]∑=4[Fe3+Al2Fe2+]∑=4[Si2O7][SiO4]3O(OH)2, a new member of the polysomatic epidote–törnebohmite series from the Nya Bastnäs Fe-Cu-REE deposit, Sweden

Cited by 3 publications

References 16 publications

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa₃)(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂ and perbøeite-(La), (CaLa₃)(Al₃Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa₃)(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂ and perbøeite-(La), (CaLa₃)(Al₃Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂

Gatelite-supergroup minerals: recommended nomenclature and review

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Ferriperbøeite-(Ce), [CaCe3]∑=4[Fe3+Al2Fe2+]∑=4[Si2O7][SiO4]3O(OH)2, a new member of the polysomatic epidote–törnebohmite series from the Nya Bastnäs Fe-Cu-REE deposit, Sweden

Cited by 3 publications

References 16 publications

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa3)(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 and perbøeite-(La), (CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa3)(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 and perbøeite-(La), (CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2

Gatelite-supergroup minerals: recommended nomenclature and review

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The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa₃)(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂ and perbøeite-(La), (CaLa₃)(Al₃Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa₃)(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂ and perbøeite-(La), (CaLa₃)(Al₃Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂