Crystal structure and cation transport properties of the layered monodiphosphates Rb6Bi4(PO4)2(P2O7)3

Falah, Chiraz; Boughzala, Habib; Jouini, Tahar; Madani, A.

doi:10.1016/s0022-4596(03)00108-7

Cited by 16 publications

(8 citation statements)

References 19 publications

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“…This is the reason why K + has moved to the X1 site. The M1 site is occupied by K2 and the M2 site is ®lled by Bi, as observed in K 3 Bi 2 (PO 4 ) 3 (Falah et al, 2001). There are the two examples of the full occupancy of the X1 and M1 sites by K + cations.…”

Section: Commentmentioning

confidence: 62%

“…However, the effect of lone pairs has been studied by few authors. For these reasons, we have investigated the A±Bi±P± O system (A = monovalent cation) and have previously reported the syntheses and crystal structures of Na 5 Bi(P 2 O 7 ) 2 (Boughzala & Jouini, 1999), K 3 Bi 2 (PO 4 ) 3 (Falah et al, 2001) and Rb 6 Bi 4 (PO 4 ) 2 (P 2 O 7 ) 4 (Falah et al, 2003). In further investigations, we replaced P by As in order to ®nd new alkali bismuth arsenate compounds in the A±Bi±As±O system (A being a monovalent cation).…”

Section: Commentmentioning

confidence: 99%

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Tripotassium dibismuth(III) tris[arsenate(V)], K₃Bi₂(AsO₄)₃

2004

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Key indicatorsSingle-crystal X-ray study T = 293 K Mean '(As±O) = 0.007 A Ê R factor = 0.026 wR factor = 0.051 Data-to-parameter ratio = 12.7For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. # 2004 International Union of Crystallography Printed in Great Britain ± all rights reservedThe title compound was prepared by a solid-state reaction at 1123 K. Its structure is closely related to that of alluaudite. The main structural feature is the presence of in®nite chains of edge-sharing Bi 2 O 10 dimers, which are linked by AsO 4 tetrahedra to form a framework enclosing two types of channels where K + cations reside. The X1 site of the alluaudite structure is occupied by K + , whereas the X2 site is empty.A projection of the structure of K 3 Bi 2 (AsO 4 ) 3 , viewed along the c axis.Colour key: BiO 6 polyhedra yellow and AsO 6 polyhedra blue.

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Section: Commentmentioning

confidence: 62%

Section: Commentmentioning

confidence: 99%

Tripotassium dibismuth(III) tris[arsenate(V)], K₃Bi₂(AsO₄)₃

2004

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“…[6] This activity seems accentuated in the case of Bi(3), since the oxygen atom O(17) of its environment is located at a distance of 2.10 Å, the bond is relatively short compared to those found usually in the bibliography. [14,16,17] The phosphorus tetrahedra are connected to the bismuth polyhedra by corners (Figure 5 and 6) and form a three-dimensional anionic framework [Bi 6.5 (PO 4 ) 7.5 ] 3-. The potassium atoms are located in tunnel the [101] direction.…”

Section: Transport Pathways Simulationmentioning

confidence: 99%

“…[10] Bi-based materials are well known in the photocatalytic system. [11] In previous papers, we have investigated the ternaries systems A + 2 O-Bi 2 O 3 -P 2 O 5 and A + 2 O-Bi 2 O 3 -As 2 O 5 (A = Li + , Na + , K + ), and we have synthesized same new materials as single crystal such as Na 3 Bi 2 (AsO 4 ) 3 , [12] K 0.405 Bi 0.865 (AsO 4 ), [13] K 3 Bi 5 (AsO 4 ) 6 , [14] K 6 Bi 2 (P 2 O 7 ) 3 , [15] K 3 Bi 2 (AsO 4 ) 3 , [16] Rb 6 Bi 4 (PO 4 ) 2 (P 2 O 7 ) 3 , [17] K 3 Bi 2 (PO 4 ) 3 , [18] and Na 5 Bi 2 (AsO 4 )(As 2 O 7 ) 2 . [19] The structural diversity of this ternary system and the obtaining of novel crystal structures motivates us to continue research.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Single‐Crystal Structure, Dielectric Properties of a New Phosphate K₃Bi_6.5(PO₄)_7.5

Falah

Smida²,

Sdiri

et al. 2021

Crystal Research and Technology

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New potassium bismuth phosphate K 3 Bi 6.5 (PO 4 ) 7.5 has been synthesized by solid-state reaction and characterized by single-crystal X-ray diffraction. This compound crystallizes in the monoclinic system, space group C2, with a = 17.637( 8) Å, b = 6.9261(8) Å, c = 22.385(4)Å, = 104.35(2)°, and Z = 4. The crystal structure model is supported by the two methods; the charge distribution (CHARDI) and bond valence sum (BVS). The crystal structure is made up of BiO n (n = 5, 6, 7, 8) polyhedra and PO 4 tetrahedra sharing corners and edges to form a three-dimensional anionic framework. The bond valence sum energy (BVSE) model of simulation shows that the potassium atoms move along [101] direction with a zigzag pathways form with an empirical activation energy of about 1.56 eV. The dielectric properties are carried out at room temperature and show high permittivity values with low dielectric loss.

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“…It is well established that molecules containing ions such as Bi 3+ , Sb 3+ or Pb 2+ exhibit distorted structures due to the electrostatic effect of the lone pair of electron [9][10][11]. The characteristic feature of the bismuth compounds is a rich variety of the anionic stoichiometry [12].…”

Section: Introductionmentioning

confidence: 99%

Crystal structure and electrical properties study of 4-aminopyridinium chloridobismuthate (III) (C5N2H7)4.HBi2Cl11

Khelifi¹,

Mkaouar²,

Hlel

et al. 2010

Ionics

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The crystal structure of (C 5 N 2 H 7 ) 4 .HBi 2 Cl 11 has been determined at room temperature by single crystal X-ray diffraction. The compound crystallizes in the triclinic system with Pī space group. The crystal structure consists of two asymmetric inequivalent molecules of 4-aminopyridinium and anionic HBi 2 Cl 11 chains. The HBi 2 Cl 11 anionic chains stacked along the a-axis are formed with Bi 2 Cl 11 dimers connected to each other via hydrogen atoms. The crystal packing is stabilized with N-H...Cl hydrogen bonds connecting aminopyridinium units to the HBi 2 Cl 11 anionic chains. The title compound exhibits an order-disorder phase transition at 338 K. The AC electrical conductivity properties of (C 5 N 2 H 7 ) 4 . HBi 2 Cl 11 compound have been investigated by means of impedance spectroscopy measurements over wide ranges of frequencies and temperatures, 200 Hz to 5 MHz and 303 to 418 K, respectively. Detailed analysis of the impedance spectrum suggests that the electrical properties of the material are strongly temperature dependent. The frequency-dependent conductivity data were fitted in the Jonscher's law: s w ð Þ ¼ sð0Þ þ Aw n . The nature of variation of DC conductivity suggests Arrhenius type of electrical conductivity.

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Crystal structure and cation transport properties of the layered monodiphosphates Rb6Bi4(PO4)2(P2O7)3

Cited by 16 publications

References 19 publications

Tripotassium dibismuth(III) tris[arsenate(V)], K₃Bi₂(AsO₄)₃

Tripotassium dibismuth(III) tris[arsenate(V)], K₃Bi₂(AsO₄)₃

Synthesis, Single‐Crystal Structure, Dielectric Properties of a New Phosphate K₃Bi_6.5(PO₄)_7.5

Crystal structure and electrical properties study of 4-aminopyridinium chloridobismuthate (III) (C5N2H7)4.HBi2Cl11

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Crystal structure and cation transport properties of the layered monodiphosphates Rb6Bi4(PO4)2(P2O7)3

Cited by 16 publications

References 19 publications

Tripotassium dibismuth(III) tris[arsenate(V)], K3Bi2(AsO4)3

Tripotassium dibismuth(III) tris[arsenate(V)], K3Bi2(AsO4)3

Synthesis, Single‐Crystal Structure, Dielectric Properties of a New Phosphate K3Bi6.5(PO4)7.5

Crystal structure and electrical properties study of 4-aminopyridinium chloridobismuthate (III) (C5N2H7)4.HBi2Cl11

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Tripotassium dibismuth(III) tris[arsenate(V)], K₃Bi₂(AsO₄)₃

Tripotassium dibismuth(III) tris[arsenate(V)], K₃Bi₂(AsO₄)₃

Synthesis, Single‐Crystal Structure, Dielectric Properties of a New Phosphate K₃Bi_6.5(PO₄)_7.5