Eudialyte group

Eudialyte group is a group of complex trigonal zircono- and, more rarely, titanosilicate minerals with general formula [N(1)N(2)N(3)N(4)N(5)]₃[M(1a)M(1b)]₃M(2)₃M(4)Z₃[Si₂₄O₇₂]O'₄X₂, where N(1) and N(2) and N(3) and N(5) = Na^+ and more rarely H₃O^+ or H₂O, N(4) = Na^+, Sr^2+, Mn^2+ and more rarely H₃O^+ or H₂O or K^+ or Ca^2+ or REE^3+ (rare earth elements), M(1) and M(1b) = Ca^2+, M(1a) = Ca^2+ or Mn^2+ or Fe^2+, M(2) = Fe (both II and III), Mn and rarely Na^+, K^+ or Zr^4+, M(3) = Si, Nb and rarely W, Ti and [] (vacancy), M(4) = Si and or rarely [], Z Zr^4+ and or rarely Ti^4+, and X = OH^−, Cl^− and more rarely CO₃^2− or F^−. Some of the eudialyte-like structures can even be more complex, however, in general, its typical feature is the presence of [Si₃O₉]^6− and [Si₉O₂₇]^18− ring silicate groups. Space group is usually R3m or R-3m but may be reduced to R3 due to cation ordering.[1] Like other zirconosilicates, the eudialyte group minerals possess alkaline ion-exchange properties, as microporous materials.[2]

List of the eudialyte-group minerals

Approved species

• Alluaivite - Na₁₉(Ca,Mn)₆(Ti,Nb)₃Si₂₆O₇₄Cl·2H₂O (space group R-3m)
• Andrianovite - Na₁₂(K,Sr,Ce)₃Ca₆Mn₃Zr₃NbSi(Si₃O₉)₂(Si₉O₂₇)₂O(O,H₂O,OH)₅ (space group R3m)
• Aqualite – (H₃O)₈(Na,K,Sr)₅Ca₆Zr₃Si₂₆O₆₆(OH)₉Cl (space group R3)
• Carbokentbrooksite – (Na,[ ])₁₂(Na,Ce)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(OH)₃(CO₃)·H₂O (space group R3m)
• Davinciite – Na₁₂K₃Ca₆Fe2+3Zr₃(Si₂₆O₇₃OH)Cl₂ (space group R3m)
• Dualite – Na₃₀(Ca,Na,Ce,Sr)₁₂(Na,Mn,Fe,Ti)₆Zr₃Ti₃Mn(Si₅₁O₁₄₄)(OH,H₂O,Cl)₉ (space group R3m)
• Eudialyte – Na₁₅Ca₆(Fe,Mn)₃Zr₃(Si₃O₉)₂SiO(Si₉O₂₇)₂(O,OH,H₂O)₃(OH,Cl)₂ (space group R-3m)
• Feklichevite – Na₁₁Ca₉(Fe^3+,Fe^2+)₂Zr₃Nb[Si₂₅O₇₃](OH,H₂O,Cl,O)₅ (space group R3m)
• Fengchengite – Na₁₂[ ]₃(Ca,Sr)₆Fe3+3Zr₃Si(Si₂₅O₇₃)(H₂O,OH)₃(OH,Cl)₂ (space group R-3m)
• Ferrokentbrooksite – Na₁₅Ca₆(Fe,Mn)₃Zr₃NbSi₂₅O₇₃(O,OH,H₂O)₃(Cl,F,OH)₂ (space group R3m)
• Georgbarsanovite – Na₁₂(Mn,Sr,REE)₃Ca₆Fe₃Zr₃NbSi₂₅O₇₆Cl₂·H₂O (space group R3m)
• Golyshevite – (Na₁₀Ca₃)Ca₆Zr₃Fe₂SiNb(Si₃O₉)₂(Si₉O₂₇)₂(OH)₃(CO₃)·H₂O (space group R3m)
• Ikranite – (Na,H₃O)₁₅(Ca,Mn)₆Fe^3+₂Zr₃₋₄SiO(Si₃O₉)₂(Si₉O₂₇)₂·2− 3H₂O (space group R3m)
• Ilyukhinite – (H₃O,Na)₁₄Ca₆Mn₂Zr₃Si₂₆O₇₂(OH)₂·3H₂O – the most recent add (space group R3m)[3]
• Johnsenite-(Ce) – Na₁₂(Ce,La,Sr,Ca)₃Ca₆Mn₃Zr₃WSiO(Si₃O₉)₂(Si₉O₂₇)₂(CO₃)(OH,Cl)₂·H₂O (space group R3m)
• Kentbrooksite – (Na,REE)₁₅(Ca,REE)₆(Mn,Fe)₃Zr₃(Si₃O₉)₂SiO(Si₉O₂₇)₂(O,OH,H₂O)₃F₂·2H₂O) (space group R3m)
• Khomyakovite – Na₁₂Sr₃Ca₆Fe₃Zr₃(W,Nb)SiO(Si₃O₉)₂(Si₉O₂₇)₂(O,OH,H₂O)₃(OH,Cl)₂ (space group R3m)
• Labyrinthite – (Na,K,Sr)₃₅Ca₁₂Fe₃Zr₆TiSi₅₁O₁₄₄(O,OH,H₂O)₉Cl₃ (space group R3)
• Manganokhomyakovite – Na₁₂Sr₃Ca₆Mn₃Zr₃(W,Nb)SiO(Si₃O₉)₂(Si₉O₂₇)₂(O,OH,H₂O)₃(OH,Cl)₂ (space group R3m)
• Manganoeudialyte – Na₁₄Ca₆Mn₃Zr₃[Si₂₆O₇₂(OH)₂]Cl₂·4H₂O (space group R3m)
• Mogovidite – Na₉(Ca,Na)₅Ca₆Zr₃Fe₂(SiNb)(Si₃O₉)₂(Si₉O₂₇)₂(CO₃)(OH,H₂O)₃Cl_0.3 (space group R3m)
• Oneillite – Na₁₅Ca₃Mn₃Fe^2+₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(OH,Cl)₂ (space group R3)
• Raslakite – Na₁₅Ca₃Fe^2+₃(Na,Zr)₃Zr₃(Si,Nb)SiO(Si₃O₉)₂(Si₉O₂₇)₂(OH,H₂O)₃(Cl,OH) (space group R3)
• Rastsvetaevite – Na₂₇K₈Ca₁₂Fe₃Zr₆Si₅₂O₁₄₄(O,OH,H₂O)₆Cl₂ (space group R3m)
• Taseqite – Na₁₂Sr₃Ca₆Fe₃Zr₃NbSiO(Si₃O₉)₂(Si₉O₂₇)₂(O,OH,H₂O)₃Cl₂ (space group R3m)
• Voronkovite – Na₁₅(Na,Ca,Ce)₃(Mn,Ca)₃Fe₃Zr₃Si₂₆O₇₂(OH,O)₄Cl·H₂O (space group R3)
• Zirsilite-(Ce) – (Na, [ ])₁₂(Ce,Na)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(OH)₃(CO₃)·H₂O (space group R3m)

Unnamed species

The list of eudialyte-related natural phases is growing. There are many such phases, some of them very complex, coded "UM" by the International Mineralogical Association, and include:[4][5]

• UM-1971-22-SiO:CaClFeHMgMnNaNbZr – Na₁₂Ca₅(Ce,La,Y,Ca)Zr₃(Zr,Nb)(Fe,Mn)₃[Si₉O₂₄₋₂₆(OH)₁₋₃]·2(Si₃O₉)₂Cl – with variable substitution of OH for oxygen
• UM1990-79-SiO:CaClFeHMnNaNbREEZr – Na₁₄Ca₅(Mg,Ca,Mn)Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Zr)₃(Mn,Na,Ce,La,Y)(Na,H₂O,K,Sr)(OH)₄₋₅(OH,Cl) – first representative with magnesium-dominant site
• UM1990-80- SiO:CaFeHMnNaNbREEZr – Na₁₄Ca₄(Mn,Ca)₂Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Mn,Al,Ti)₃(Na,Ce,La,Y,Mn)(Na,H₂O,K,Sr)(OH)₇₋₈
• UM1998-21-SiO:CaCeClHMnNaZr – Na₁₆Ca₆(Mn,Ce)₃Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(OH,Cl)₄
• UM1999-36-SiO:CaCeHMnNaNbSrZr – Na₁₇Mn₃Ca₂Zr₃Si₂₆O₇₂(OH,F,Cl)₄
• UM2000-66-SiO:CaClFeHMnNaNbSrZr – Na₁₂(Ca,Mn)₆(Sr,Na,K)₃(Fe,Mn)₃(Zr,Nb)₄Si₂₅O₆₆(OH,Cl)₁₁
• UM2003-39- SiO:CaClFeHHfNaNbSrTaTiZr – Na₁₂(Na,K,Mn,Sr)₂Ca₅(Ca,Mn)(Zr,Hf)₃(Fe,[ ],Ta)₃(Si,Nb,W)(Si,Al,Ti)Si₂₄O₇₂(OH,O)_33.5Cl·1.2H₂O
• UM2004-51-SiO:CaClFFeHNaNbTi' – Na₁₆Ca₆(Fe,Mn)₃Zr₃(Ti,Nb)Si₂₆O₇₂FCl_0.5·nH₂O
• UM2006-17-SiO:CaClFFeHMnNaZr – Na₁₅(Ca₃Mn₃)Zr₃(Fe,Zr)₃SiSi(Si₃O₉)₂(Si₉O₂₇)₂O₂(OH,F,Cl)₃·2H₂O
• UM2006-18-SiO:CaClFFeHMnNaZr – Na₁₅Ca₃(Mn,Fe)₃Zr₃(Zr,Na)₃(Si,Nb)(S,Ti,Si)(Si₃O₉)₂(Si₉O₂₇)₂(O,OH)₅(Cl,F,H₂O) – with essential sulfur and with Zr dominant in two sites
• UM2006-28-SiO:CaHMnNaZr – Na₃₃Ca₁₂Zr₆Mn₃(Mn,Nb,Ti)₂Si₅₀O₁₃₂(O,OH)₁₂(OH,H₂O,Cl)₁₀ – with double c unit cell dimension

In addition, there is "eudialyte 3248": Na₂₉Ca₁₂Zr₆[Si₄₈O₁₃₂(O,OH)₁₂]{[Na]₄[Si]₂{[Mn]₃[Mn,Nb,Ti]₂}(OH,H₂O,Cl)₁₀, plus admixtures of Ce, Sr, Ba and Y, characterized by one S-dominant site (not shown in the simplified formula)[6]

Other species

Rastsvetaeva et al. (2015) describe a species tentatively called "hydrorastsvetaevite", with a formula (Na₁₁(H₃O)₁₁K₆(H₂O)_1.5Sr)Ca₁₂Fe₃Na₂MnZr₆Si₅₂O₁₄₄(OH)_4.5Cl_3.5.[7]

Further reading

• Ageeva, O. A.; Borutzky, B. Ye; Chukanov, N. V.; Sokolova, M. N. (2002). "Alluaivite and genetic aspect of the forming of enriched in Ti eudialytes in Khibiny massif". Zapiski Vserossijskogo Mineralogičeskogo Obŝestva. 131 (1): 99–106. INIST 13846139.
• Khomyakov, A. P.; Nechelyustov, G. N.; Rastsvetaeva, R. K.; Rozenberg, K. A. (2009). "Andrianovite, Na₁₂(K,Sr,Ce)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O, H₂O,OH)₅, a new potassium-rich mineral species of the eudialyte group from the Khibiny alkaline Pluton, Kola Peninsula, Russia". Geology of Ore Deposits. 50 (8): 705–12. Bibcode:2008GeoOD..50..705K. doi:10.1134/S1075701508080060. S2CID 93336238.
• Khomyakov, A. P.; Nechelyustov, G. N.; Rastsvetaeva, R. K. (2007). "Aqualite, a new mineral species of the eudialyte group from the Inagli alkaline pluton, Sakha-Yakutia, Russia, and the problem of oxonium in hydrated eudialytes". Geology of Ore Deposits. 49 (8): 739–51. Bibcode:2007GeoOD..49..739K. doi:10.1134/S1075701507080089. S2CID 94118983.
• Khomyakov, A. P.; Dusmatov, V. D.; G.; Gula, A.; Ivaldi, G.; Nechelyustov, G. N. (2003). "Zapiski Vserossijskogo mineralogičeskogo obŝestva". 132 (5): 40–51. INIST 15861098. {{cite journal}}: Cite journal requires |journal= (help)
• Khomyakov, A. P.; Nechelyustov, G. N.; Rastsvetaeva, R. K. (2007). "Dualite, Na₃₀(Ca,Na,Ce,Sr)₁₂(Na,Mn,Fe,Ti)₆Zr₃Ti₃MnSi₅₁O₁₄₄(OH,H₂O,Cl)₉, a new zircono-titanosilicate with a modular eudialyte-like structure from Lovozero alkaline massif, Kola Peninsula, Russia". Zapiski Vserossijskogo Mineralogičeskogo Obŝestva. 136 (4): 31–42. INIST 20451408.
• Rozenberg, K. A.; Rastsvetaeva, R. K.; Chukanov, N. V.; Verin, I. A. (2005). "Crystal structure of a niobium-deficient carbonate analogue of feklichevite". Doklady Chemistry. 400 (4–6): 25–9. doi:10.1007/s10631-005-0014-5. S2CID 95801098.
• Rozenberg, K. A.; Rastsvetaeva, R. K.; Chukanov, N. V.; Verin, I. A. (2005). "Crystal structure of golyshevite". Crystallography Reports. 50 (4): 539–43. Bibcode:2005CryRp..50..539R. doi:10.1134/1.1996727. S2CID 95021312.
• Johnsen, O.; Grice, J. D.; Gault, R. A. (2003). "Ferrokentbrooksite, A New Member of the Eudialyte Group from Mont Saint-Hilaire, Quebec, Canada". The Canadian Mineralogist. 41 (1): 55–60. Bibcode:2003CaMin..41...55J. doi:10.2113/gscanmin.41.1.55.
• Piilonen, Paula C.; Locock, Andrew J.; Rowe, Ralph; Ercit, T. Scott (2007). "New Mineral Names" (PDF). American Mineralogist. 92 (4): 703–7. Bibcode:2007AmMin..92..703P. doi:10.2138/am.2007.488.
• Chukanov, N. V.; Pekov, I. V.; Zadov, A. E.; Korovushkin, V. V.; Ekimenkova, I. A.; Rastsvetaeva, R. K. (2003). "Ikranite (Na,H₃O)₁₅(Ca,Mn,REE)₆Fe^3+₂Zr₃(□,Zr)(□,Si)Si₂₄O₆₆(O,OH)₆Cl·nH₂О and raslakite Na₁₅Ca₃Fe₃(Na,Zr)₃Zr₃(Si,Nb)(Si₂₅O₇₃)(OH,H₂O)₃(Cl,OH) – the new eudialyte-group minerals from Lovozero massif, Kola Peninsula". Zapiski Vserossijskogo Mineralogičeskogo Obŝestva. 132 (5): 22–33. INIST 15861096.
• Grice, Joel D.; Gault, Robert A. (2006). "Johnsenite-(Ce) : A new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada". The Canadian Mineralogist. 44 (1): 105–15. Bibcode:2006CaMin..44..105G. doi:10.2113/gscanmin.44.1.105. INIST 17777968.
• Jambor, John L.; Kovalenker, Vladimir A.; Roberts, Andrew C. (2000). "New Mineral Names" (PDF). American Mineralogist. 85: 873–7.
• Khomyakov, A. P.; Nechelyustov, G. N.; Rastvetaeva, R. K. (2006). "Labyrinthite (Na,K,Sr)₃₅Ca₁₂Fe₃Zr₆TiSi₅₁·O₁₄₄(O,OH,H₂O)₉C_l3, a new mineral with the modular eudialyte-like structure from Khibiny alkaline massif, Kola Peninsula Russia". Zapiski Vserossijskogo Mineralogičeskogo Obŝestva. 135 (2): 38–49. INIST 18813948.
• Ercit, T. Scott; Piilonen, Paula C.; Rowe, Ralph (2007). "New Mineral Names" (PDF). American Mineralogist. 92 (8–9): 1539–42. Bibcode:2007AmMin..92.1539E. doi:10.2138/am.2007.499.
• Johnsen, Ole; Grice, Joel D.; Gault, Robert A. (1999). "Oneillite: a new Ca-deficient and REE-rich member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada". The Canadian Mineralogist. 37: 1295–301.
• Khomyakov, A. P.; Nechelyustov, G. N.; Arakcheeva, A. V. (2006). "Rastsvetaevite Na₂₇K₈Ca₁₂Fe₃Zr₆Si₄[Si₃O₉]₄[Si₉O₂₇]₃₄(О,ОН,Н₂О) ₆С_l2, a new mineral with a modular eudialyte-like structure and crystal-chemical systematics of the eudialyte group". Zapiski Vserossijskogo Mineralogičeskogo Obŝestva. 135 (1): 49–65. INIST 18813995.
• Petersen, O. V.; Johnsen, O.; Gault, R. A.; Niedermayr, G.; Grice, J. D. (2004). "Taseqite, a new member of the eudialyte group from the Ilímaussaq alkaline complex, South Greenland". Neues Jahrbuch für Mineralogie - Monatshefte. 2004 (2): 83–96. doi:10.1127/0028-3649/2004/2004-0083. INIST 15422915.
• Rastsvetaeva, R. K.; Chukanov, N. V.; Zaitsev, V. A.; Aksenov, S. M.; Viktorova, K. A. (2018–05). "Crystal Structure of Cl-Deficient Analogue of Taseqite from Odikhincha Massif". Crystallography Reports. 63 (3): 349–357. doi:10.1134/s1063774518030240. ISSN 1063-7745

References

1. Johnsen, O.; Ferraris, G.; Gault, R. A.; Grice, J. D.; Kampf, A. R.; Pekov, I. V. (2003). "The Nomenclature of Eudialyte-Group Minerals". The Canadian Mineralogist. 41 (3): 785–794. Bibcode:2003CaMin..41..785J. doi:10.2113/gscanmin.41.3.785.
2. Zubkova, Natalia V.; Pushcharovsky, Dmitrii Yu. (2008). Mixed-Framework Microporous Natural Zirconosilicates : Minerals as Advanced Materials I. pp. 45–56. doi:10.1007/978-3-540-77123-4_6. ISBN 978-3-540-77122-7.
3. Hålenius, U.; Hatert, F.; Pasero, M.; Mills, S. J. (2015). "New minerals and nomenclature modifications approved in 2015". Mineralogical Magazine. 79 (7): 1859–1864. Bibcode:2015MinM...79.1859H. doi:10.1180/minmag.2015.079.7.18.
4. Mindat, http://www.mindat.org
5. Smith, D.G.W., and Nickel, E.H.N., 2007. A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist v. 45, p.983-1055; http://nrmima.nrm.se/Valid2012.pdf Archived 2016-03-05 at the Wayback Machine
6. Rastsvetaeva, R. K.; Ivanova, A. G.; Khomyakov, A. P. (2006-10-01). "Modular structure of hypermanganese eudialyte". Doklady Earth Sciences. 410 (1): 1075–1079. doi:10.1134/S1028334X06070166. ISSN 1531-8354.
7. Rastsvetaeva, R. K.; Aksenov, S. M.; Rozenberg, K. A. (2015). "Crystal structure and genesis of the hydrated analog of rastsvetaevite". Crystallography Reports. 60 (6): 831–840. Bibcode:2015CryRp..60..831R. doi:10.1134/S1063774515060279. S2CID 97600291.

External links

• Mindat.org
• The Eudialyte homepage Archived 2009-08-04 at the Wayback Machine