Abstract
Co-precipitation of PbF2 and PbSeO4 in weakly acidic media results in the formation of [Pb2F2](SeO4), the selenate analogue of the naturally occurring mineral grandreefite, [Pb2F2](SO4). The new compound is monoclinic, C2/c, a = 14.0784(2) Å, b = 4.6267(1) Å, c = 8.8628(1) Å, β = 108.98(1)°, V = 545.93(1) Å3. Its structure has been refined from powder data to R B = 1.55%. From thermal studies, it is established that the compound is stable in air up to about 300 °C, after which it gradually converts into a single phase with composition [Pb2O](SeO4), space group C2/m, and lattice parameters a = 14.0332(1) Å, b = 5.7532(1) Å, c = 7.2113(1) Å, β = 115.07(1)°, V = 527.37(1) Å3. It is the selenate analogue of lanarkite, [Pb2O](SO4), and phoenicochroite, [Pb2O](CrO4), and its crystal structure was refined to R B = 1.21%. The formation of a single decomposition product upon heating in air suggests that this happens by a thermal hydrolysis mechanism, i.e., Pb2F2SeO4 + H2O (vapor) → Pb2OSeO4 + 2HF↑. This relatively low-temperature process involves complete rearrangement of the crystal structure—from a 2D architecture featuring slabs [Pb2F2]2+ formed by fluorine-centered tetrahedra into a structure characterized by 1D motifs based on [OPb2]2+ chains of oxocentered tetrahedra. The comparative crystal chemistry of the obtained anion-centered structural architectures is discussed.
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References
Aurivillius B (1980) On the crystal structures of some lead fluorohalides composed of fluorite-like blocks and single halogen layers. Chem Scripta 15:153–164
Balestracci R, Marechal L (1967) Etude structurale des sulfates basiques de terres rares et d’yttrium. Mater Res Bull 2:993–998
Belokoneva EL, Troneva EA, Dem’yanets LN, Duderov NG, Belov NV (1982) The crystal structure of synthetic fluoropyromorphite Pb5(PO4)3F. Sov Phys Crystallogr 27:476–477
Bosselet F, Mentzen BF, Bouix J (1985) Étude de la solution Pb2O(S1-xWxO4) et structure cristalline de la varieté alpha du monooxodiplomb(II) tetraoxotungstate(VI) Pb2O(WO4) par diffraction X sur poudres. Mater Res Bull 20:1329–1337
Burakov SV, Zaloga AN, Semenkin ES, Yakimov IS (2015) Research on convergence of multipopulation binary- and real-coded genetic algorithms for solution of crystal structure from X-ray powder diffraction data. Cryst Res Technol 50:724–728
Charkin DO (2008) Modular approach as applied to the description, prediction, and targeted synthesis of bismuth oxohalides with layered structures. Russ J Inorg Chem 53:1977–1996
Charkin DO, Grischenko RO, Sadybekov AA, Goff RJ, Lightfoot P (2008) A new approach to synthesis of layered fluorites containing molecular anions: synthesis of Ln2O2CO3, K(LnO)CO3 and La2O2CrO4 via metathesis reactions. Inorg Chem 47:3065–3071
Charykova MV, Krivovichev VG (2017) Mineral systems and the thermodynamics of selenites and selenates in the oxidation zone of sulfide ores—a review. Mineral Petrol 111:121–134
Dickinson RG, Friauf JB (1924) The crystal structure of tetragonal lead monoxide. J Am Chem Soc 46:2457–2462
Effenberger H (1987) Crystal structure and chemical formula of schmiederite Pb2Cu2(OH)4(SeO3)(SeO4), with a comparison to linarite, PbCu(OH)2(SO4). Mineral Petrol 36:3–12
El haj Hassan F, Akbarzadeh H, Hashemifar SJ, Mokhtari A (2004) Structural and electronic properties of matlockite MFX (M=Sr, Ba, Pb; X=Cl, Br, I) compounds. J Phys Chem Solids 65:1871–1878
Fei H, Pham CH, Oliver SRJ (2012) Anion exchange of the cations layered material [Pb2F2]2+. J Am Chem Soc 134:10729–10732
Hajek B, Novotna N, Hradilova J (1979) Studies on thermal decompositions and infrared spectra of the rare-earth selenate octahydrates Ln2(SeO4)3·8H2O (Ln=Y, Tb, Dy, Ho, Er, Tm, Yb, Lu). J Less Common Met 66:121–136
Hartenbach I, Schleid T (2002) Serendipitous formation of single-crystalline Eu2O2(SO4). Z Anorg Allg Chem 628:2171
Hurlbut CS, Aristarain LF (1969) Olsacherite, Pb2(SO4)(SeO4), a new mineral from Bolivia. Am Mineral 54:1519–1527
Jones RO, Rothschild S (1958) The lead oxide–lead sulfate and lead oxide–lead selenate systems. J Electrochem Soc 105:206–209
Kampf AR (1991) Grandreefite, Pb2F2SO4: crystal structure and relationship to the lanthanide oxide sulfates, Ln2O2SO4. Am Mineral 76:278–282
Kampf AR (2001) The crystal structure of aravaipaite. Am Mineral 86:927–931
Kampf AR (2009) The crystal structure of Ba2F2(S6+O3S2−), a natural thiosulfate weathering product of old smelting slags at the Surrender Mill, Yorkshire, UK. Mineral Mag 73:251–255
Krivovichev SV, Mentré O, Siidra OI, Colmont M, Filatov SK (2013) Anion-centered tetrahedra in inorganic compounds. Chem Rev 113:6459–6535
Lide DR (ed) (1994–1995) CRC Handbook of chemistry and physics. 75th edn. CRC Press Inc., Boca Raton, pp 4–69
Lide DR (ed) (2001) CRC Handbook of chemistry and physics. 82nd edn. CRC Press Inc., Boca Raton, pp 8-108–8-112
Matsubara S, Mouri T, Miyawaki R, Yokoyama K, Nakahara M (2008) Munakataite, a new mineral from the Kato mine, Fukuoka, Japan. J Mineral Petrol Sci 103:327–332
Mentzen BF, Latrach A, Bouix J, Hewat AW (1984) The crystal structures of PbO·PbXO4 (X=S, Cr, Mo) at 5 K by neutron powder profile refinement. Mater Res Bull 19:549–554
Moore PB, Kampf AR, Sen Gupta PK (2000) The crystal structure of philolithite, a trellis-like open framework based on cubic closest-packing of anions. Am Mineral 85:810–816
Pasero M, Perchiazzi N (1996) Crystal structure refinement of matlockite. Mineral Mag 60:833–836
Pasero M, Rotiroti N (2003) The crystal structure of molybdomenite, PbSeO3. Neues Jahrb Miner Monatshefte 2003:145–152
Pearson RG (1988) Absolute electronegativity and hardness: application to inorganic chemistry. Inorg Chem 27:734–740
Petriček V, Dusek M, Palatinus L (2014) Crystallographic computing system JANA2006: general features. Z Kristallogr 229:345–352
Rogow DL, Zapeda G, Swanson CH, Fan X, Campana CF, Oliver AG, Oliver SRJ (2007) A metal-organic framework containing cationic inorganic layers Pb2F2[(C2H4(SO3)2]. Chem Mater 19:4658–4662
Sahl K (1970) Zur Kristallstruktur von Lanarkit, Pb2O(SO4). Z Kristallogr 132:99–117
Shimoni-Livny L, Glusker JP, Bock CW (1998) Lone pair functionality in divalent lead compounds. Inorg Chem 37:1853–1867
Shuvalov RR, Vergasova LP, Semenova TF, Filatov SK, Krivovichev SV, Siidra OI, Rudashevsky NS (2013) Prewittite, KPb1.5Cu6Zn(SeO3)2O2Cl10, a new mineral from Tolbachik fumaroles, Kamchatka peninsula, Russia: description and crystal structure. Am Mineral 98:463–469
Siidra OI, Krivovichev SV, Filatov SK (2008) Minerals and synthetic Pb(II) compounds with oxocentered tetrahedra: review and classification. Z Kristallogr 223:114–125
Siidra OI, Krivovichev SV, Turner RW, Rumsey MS, Spratt J (2013a) Crystal chemistry of layered Pb oxychloride minerals with PbO-related structures. Crystal structure of hereroite, [Pb32O20(O,□)](AsO4)2((Si, As, V, Mo)O4)2Cl10. Am Mineral 98:248–255
Siidra OI, Krivovichev SV, Turner RW, Rumsey MS, Spratt J (2013b) Crystal chemistry of layered Pb oxychloride minerals with PbO-related structures. II. Crystal structure of vladkrivovichevite, [Pb32O18][Pb4Mn2O]Cl14(BO3)8·2H2O. Am Mineral 98:256–261
Siidra OI, Zinyakhina DO, Zadoya AI, Krivovichev SV, Turner RW (2013c) Synthesis and modular structural architectures of mineralogically inspired novel complex Pb oxyhalides. Inorg Chem 52:12799–12805
Siidra OI, Gogolin M, Lukina EA, Kabbour H, Bubnova RS, Mentre O, Agakhanov AA, Krivovichev SV, Colmont M, Gesing T (2015) Structural evolution from 0D Units to 3D frameworks in Pb oxyhalides: unexpected strongly corrugated layers in Pb7O6Br2. Inorg Chem 54:11550–11556
Siidra OI, Kabbour H, Mentré O, Nazarchuk EV, Kegler P, Zinyakhina DO, Colmont M, Depmeier W (2016) Lead oxychloride borates obtained under extreme conditions. Inorg Chem 55:9077–9084
Turner RW, Siidra OI, Krivovichev SV, Stanley CJ, Spratt J (2012) Rumseyite, [Pb2OF]Cl, the first naturally occurring fluoroxychloride mineral with the parent crystal structure for layered lead oxychlorides. Mineral Mag 76:1247–1255
Weil M, Kubel F (2000) Präparation und Strukturanalyse der Verbindungen Ba2Pb4F10Br 2-xIx (x = 0–2) mit verwandten kristallchemischen Motiven aus der Fluorit-und Matlockitstruktur. Z Anorg Allg Chem 626:22481–24861
Williams SA, McLean J, Anthony JW (1970) A study of phoenicochroite-its structure and properties. Am Mineral 55:784–792
Zhukov SG, Yatsenko A, Chernyshev VV, Trunov V, Tserkovnaya E, Antson O, Hölsä J, Baules P, Schenk H (1997) Structural study of lanthanum oxysulfate (LaO)2SO4. Mat Res Bull 32:43–50
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This work was supported by St. Petersburg State University through the internal Grant 3.38.238.2015. Technical support by the X-Ray Diffraction Resource Centre of Saint-Petersburg State University is gratefully acknowledged.
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Charkin, D.O., Plokhikh, I.V., Zadoya, A.I. et al. [Pb2F2](SeO4): a heavier analogue of grandreefite, the first layered fluoride selenate. Phys Chem Minerals 45, 69–76 (2018). https://doi.org/10.1007/s00269-017-0903-4
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DOI: https://doi.org/10.1007/s00269-017-0903-4