The iron potassium diarsenate KFeAs2O7 structural, electric and magnetic behaviors

Ouerfelli, N.; Guesmi, Abderrahmen; Molinié, Philippe; Mazza, Daniele; Zid, Mohamed Faouzi; Driss, Ahmed

doi:10.1016/j.jssc.2007.08.011

Cited by 31 publications

(21 citation statements)

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“…Substitution of alkali metal by lithium [8] or P 2 O 7 on As 2 O 7 [15] leads to decrease of cell symmetry but in both cases FeO 6 is surrounded by six pyrophosphate groups. This fact can be explained by high flexibility of [FeP 2 O 7 ] À network toward counterion (Na, K, Rb, Cs, Ag) due to adaptable bond angles of P-O-P (Table 4).…”

Section: Resultsmentioning

confidence: 99%

“…Compounds M I FeA 2 O 7 (M I ¼Li, Na, K, Cs, Ag, A-P, As) represent different magnetic behavior mostly due to structural features (Table 4). Thus, the magnetic susceptibility for isostructural analogues (M I ¼Na, K, Cs, Ag, A-P) shows similar linear behavior in the range 50-150 K, while KFeAs 2 O 7 [15] as well as LiFeP 2 O 7 shows generally the same temperature dependence but with ferromagnetic contribution [15,17]. Within the group of compounds with space group P2 1 /c (M I ¼Na, K, Cs) Weiss constants are comparable: its value goes up with the decrease of P-O-P angle.…”

Section: Compoundmentioning

confidence: 87%

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Structure and magnetic properties of AgFeP2O7

Тerebilenko

Kirichok

Baumer

et al. 2010

Journal of Solid State Chemistry

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Section: Resultsmentioning

confidence: 99%

Section: Compoundmentioning

confidence: 87%

Structure and magnetic properties of AgFeP2O7

Тerebilenko

Kirichok

Baumer

et al. 2010

Journal of Solid State Chemistry

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“…KInAs 2 O 7 crystallizes in space group P1 and adopts the TlInAs 2 O 7 structure type (Schwendtner, 2006), which is also known for RbInAs 2 O 7 and NH 4 InAs 2 O 7 (Schwendtner, 2006) and KFeAs 2 O 7 (Ouerfelli et al, 2007b) (see comparison in Table 1). …”

Section: Structural Commentarymentioning

confidence: 94%

“…While the former is only known from the comparatively large M 3+ cation In 3+ (Belam et al, 1997, ICDD-PDF 059-0058;Wohlschlaeger et al, 2007), the latter is adopted by the smaller M 3+ representatives (M = Al, Fe, Ga) (Ouerfelli et al, 2004;Schwendtner & Kolitsch, 2017b (Boughzala & Jouini, 1992Bouhassine & Boughzala, 2017;Lin & Lii, 1996;Siegfried et al, 2004;Ouerfelli et al, 2007a), the KAlP 2 O 7 type (Ng & Calvo, 1973), which is extremely common among M + M 3+ P 2 O 7 compounds, is favoured by the somewhat larger Sc 3+ cation (Baran et al, 2006;Kolitsch, 2004;Schwendtner & Kolitsch, 2004a) and the CsCr member CsCrAs 2 O 7 (Bouhassine & Boughzala, 2015). The third type, TlInAs 2 O 7 , is very closely related to the two former types and favoured by the large In 3+ cation (Schwendtner, 2006), with also one Fe member (KFeAs 2 O 7 ; Ouerfelli et al, 2007b). The title compound, KInAs 2 O 7 , is a new member of the latter structure type.…”

Section: +mentioning

confidence: 95%

“…The As-O bridge -As angles are 120.04 (9) and 118.77 (9) , and therefore very similar to those of the related TlIn, RbIn and NH 4 In compounds (Schwendtner 2006), but are smaller than the grand mean value in diarsenates, 124 (5) (Schwendtner & Kolitsch, 2007d Table 1 Comparison of the unit-cell parameters of diarsenates isotypic with KInAs 2 O 7 and closely related structure types. Schwendtner (2006), P1, Z = 4; (2) Ouerfelli et al (2007b), transformed to reduced cell; (3) Ng & Calvo (1973), P2 1 /c, Z = 4; (4) Schwendtner & Kolitsch (2004a); (5) Baran et al (2006); (6) Bouhassine & Boughzala (2015); (7) Kolitsch (2004); (8) Boughzala et al (1993), P1, Z = 2, transformed to reduced cell; (9) Lin & Lii (1996); (10) Boughzala & Jouini (1995); (11) Boughzala & Jouini (1992), transformed to reduced cell; (12) Bouhassine & Boughzala (2017); (13) Ouerfelli et al (2007a); (14) Siegfried et al (2004).…”

Section: Structural Commentarymentioning

confidence: 99%

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KInAs₂O₇, a new diarsenate with the TlInAs₂O₇structure type

Schwendtner

Kolitsch

2017

Acta Cryst E

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Potassium indium diarsenate(V) was grown under mild hydrothermal conditions (T = 493 K, 7 d) at a pH value of about 1. It adopts the TlInAs 2 O 7 structure type (P1, Z = 4) and is closely related to the KAlP 2 O 7 (P2 1 /c) and RbAlAs 2 O 7 (P1) structure types. The framework topology of KInAs 2 O 7 is built of two symmetrically non-equivalent As 2 O 7 groups which share corners with InO 6 octahedra. The K atoms are located in channels extending along [010]. Chemical contextMetal arsenates often form tetrahedral-octahedral framework structures exhibiting potentially interesting properties, such as ion conductivity, ion exchange and catalytic properties (Masquelier et al., 1990(Masquelier et al., , 1994a(Masquelier et al., ,b, 1995(Masquelier et al., , 1996(Masquelier et al., , 1998Mesa et al., 2000;Ouerfelli et al., 2007aOuerfelli et al., , 2008Pintard-Scré pel et al., 1983;Rousse et al., 2013). During a detailed study of the system M + -M 3+-As-O-(H) by hydrothermal syntheses, a large variety of new compounds and structure types were found (Kolitsch, 2004;Schwendtner, 2006;Schwendtner & Kolitsch, 2004a,b, 2005,b,c,d, 2017a. KInAs 2 O 7 is another example of a microporous metal diarsenate compound forming a tetrahedral-octahedral framework structure. M + M 3+ As 2 O 7 compounds crystallize in six known structure types (for a short review, see: Schwendtner & Kolitsch, 2017b), some of these diarsenates being also isotypic to diphosphates or disilicates. For several of the structures, the M + cation is the relevant factor that determines which structure type is adopted, while a wide range of different M 3+ cations are usually accepted. For example, the CaZrSi 2 O 7 structure type (mineral gittinsite; Roelofsen-Ahl & Peterson, 1989) is formed by all Li members (and one Na member), with M 3+ cations ranging from M = Al, Ga, Fe to Sc (Schwendtner & Kolitsch, 2007d;Wang et al., 1994 Table 1).The asymmetric unit contains 22 atoms, all of which lie on general positions. Each InO 6 octahedron shares corners with five different AsO 4 tetrahedra, thus creating a framework structure. Two of these connections are to two AsO 4 tetrahedra of the same As 2 O 7 group (see Fig. 1). The K + cations are situated in small channels extending along [010] (see Fig. 2) and have irregular coordination spheres, with ten (K1) and seven (K2) O atoms within 3.5 Å .The AsO 4 tetrahedra are strongly distorted, with bondlength distortion (Brown & Shannon, 1973) ranging from 0.0020 to 0.0024, while the average As-O distances (1.685, 1.687, 1.689 and 1.690 Å for As1-4, respectively, see Table 1 Comparison of the unit-cell parameters of diarsenates isotypic with KInAs 2 O 7 and closely related structure types. (2015); (7) Kolitsch (2004); (8) Figure 1The principal building unit of KInAs 2 O 7 , shown as displacement ellipsoids at the 70% probability level. The In1O 6 octahedron is considerably more distorted than the In2-centred octahedron. In fact, the In1O 6 octahedron shows the strongest distortion among all of the isotypic In compounds (S...

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ChemInform Abstract: The Iron Potassium Diarsenate KFeAs₂O₇ Structural, Electric and Magnetic Behaviors.

et al. 2008

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Iron I 7100The Iron Potassium Diarsenate KFeAs2O7 Structural, Electric and Magnetic Behaviors. -Single crystals of the new title compound are prepared from aqueous mixtures of KNO3, Fe(NO3)3, and H3AsO4 with a K:Fe:As molar ratio of 1:0.1:2 (evaporation, 400°C for 24 h, 700°C for 3 h). KFeAs2O7 crystallizes in the triclinic space group P1 with Z = 4 (single crystal XRD). The structure consists of corner-sharing FeO6 octahedra and As2O7 groups. The K + ions reside in tunnels of the three-dimensional framework. Impedance measurements show that KFeAs 2 O 7 is an ionic conductor with a conductivity of 2.76·10 -7 S/cm at 568 K. Magnetic measurements reveal Curie-Weiss paramagnetic behavior over the range 30-300 K and ferromagnetic behavior below 29.3 K. -(OUERFELLI, N.; GUESMI*, A.; MOLINIE, P.; MAZZA, D.; ZID, M. F.; DRISS, A.; J. Solid State

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The iron potassium diarsenate KFeAs2O7 structural, electric and magnetic behaviors

Cited by 31 publications

References 30 publications

Structure and magnetic properties of AgFeP2O7

Structure and magnetic properties of AgFeP2O7

KInAs₂O₇, a new diarsenate with the TlInAs₂O₇structure type

ChemInform Abstract: The Iron Potassium Diarsenate KFeAs₂O₇ Structural, Electric and Magnetic Behaviors.

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The iron potassium diarsenate KFeAs2O7 structural, electric and magnetic behaviors

Cited by 31 publications

References 30 publications

Structure and magnetic properties of AgFeP2O7

Structure and magnetic properties of AgFeP2O7

KInAs2O7, a new diarsenate with the TlInAs2O7structure type

ChemInform Abstract: The Iron Potassium Diarsenate KFeAs2O7 Structural, Electric and Magnetic Behaviors.

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KInAs₂O₇, a new diarsenate with the TlInAs₂O₇structure type

ChemInform Abstract: The Iron Potassium Diarsenate KFeAs₂O₇ Structural, Electric and Magnetic Behaviors.