The Crystal Structure of Ba2Cu2AlF11: a New Structure Type in Copper Fluoride Crystal Chemistry

Dupont, Nathalie; Kozak, A. De; Gredin, Patrick; Samouël, M.

doi:10.1002/(sici)1521-3749(199802)624:2<331::aid-zaac331>3.0.co;2-s

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…prepared in the laboratory and their modes of preparation already described in a previous paper (1). The investigation by X-ray techniques of the domain of the system mentioned above reveals the existence of numerous compounds with new and hitherto unknown powder patterns.…”

Section: Synthesis Of Ba 5 Cu 2 Al 3 F 23mentioning

confidence: 91%

The Crystal Structure of Ba5Cu2Al3F23: A Complex Barium, Copper, Aluminum Fluoride, with Copper (II) in Trigonal Prismatic Environment

Dupont

Gredin

Caramanian

et al. 1999

Journal of Solid State Chemistry

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Section: Synthesis Of Ba 5 Cu 2 Al 3 F 23mentioning

confidence: 91%

The Crystal Structure of Ba5Cu2Al3F23: A Complex Barium, Copper, Aluminum Fluoride, with Copper (II) in Trigonal Prismatic Environment

Dupont

Gredin

Caramanian

et al. 1999

Journal of Solid State Chemistry

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“…The oxides, which are prepared through solution chemistry, have starting particle sizes in the sub-micron range. These high surface area, powders can be converted into fluorides under flowing HF gas at temperatures around 500ºC within hours [208,209] There are three newer techniques that look promising and do not involve using fluorinated gases. The first involves a chemical precipitation method, the second is a hydrothermal synthesis technique and the third is through sol gel chemistry.…”

Section: Introductionmentioning

confidence: 99%

Multi-Photon Phosphor Feasibility Research

Graham¹,

Chow²

2003

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“…In the second direction the previous chains are linked together by the Fig. For instance, it presents an original kind of linkage between polyhedra, which involves simultaneously edges and vertices, as it was observed in Ba 2 Cu 2 AlF 11 [2] and Ba 4 Cu 2 Al 3 F 21 [3]. 6 ] octahedra, which belong to two different [Cu 2 F 10 ] bioctahedra (A4), or to one bioctahedron and one octahedron (B4).…”

Section: Description Of the Structure And Discussionmentioning

confidence: 99%

“…The starting fluorides BaF 2 , CuF 2 and AlF 3 used in the investigation by X-ray diffraction techniques of the ternary system were prepared in the Laboratory and their modes of preparation already described in a previous paper [2]. Figure 1 represents an isothermal section at 620°C of the system BaF 2 /CuF 2 /AlF 3 .…”

Section: Introductionmentioning

confidence: 99%

The Ternary System BaF2/CuF2/AlF3 and the Crystal Structure of Ba45Cu28Al17F197

Dupont

Gredin

Samouël

et al. 2002

Z. anorg. allg. Chem.

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The ternary system BaF 2 /CuF 2 /AlF 3 is investigated by X-ray diffraction techniques and an isothermal section at 620°C is established. It exhibits ten quaternary phases and among them Ba 45 Cu 28 Al 17 F 197 . This fluoride has a triclinic cell: a = 14.024(1) A Ê , b = 23.778(1) A Ê , c = 25.480(1) A Ê , a = 90.44(1)°, b = 90.26(1)°, c = 107.03(1)°, Z = 2. Its crystal structure was solved in the space group P1 (n o 1), from X-ray single crystal data using 41976 unique reflections. It is built up from a complex arrangement of aluminium and copper fluorine polyhedra, which are regular [AlF 6 ] and strongly distorted [CuF 6 ] octahedra, [CuF 6 ] trigonal prisms and [Cu 2 F 10 ] bipolyhedral units constituted either by two octahedra, or one octahedron and one trigonal prism, connected by an edge. These polyhedra are organized in planes of about two octahedra thickness, which form a succession of sheets running perpendicularly to the [100] direction of the cell. Each sheet is constituted by infinite chains of distorted polyhedra connected by edges and vertices and linked together by the vertices of blocks of four and six polyhedra, involving aluminium fluorine octahedra and copper fluorine bipolyhedral units or octahedra. The barium ions, 10 to 14coordinated to fluorine atoms, ensure the electroneutrality of the structure. They are inserted inside the planes. wurde ro È ntgenographisch untersucht und ein isothermer Schnitt seines Phasendiagramms bei 620°C erstellt. Es zeigt zehn quaterna È re Phasen, darunter Ba 45 Cu 28 Al 17 F 197 . Dieses Fluorid hat eine trikline Zelle: a = 14,024(1) A Ê ; b = 23,778(1) A Ê ; c = 25,480(1) A Ê ; a = 90,44(1)°; b = 90,26(1)°, c = 107,03(1)°; Z = 2. Seine Kristallstruktur wurde in der Raumgruppe P1 (Nr. 1) unter Verwendung von 41976 unabha È ngigen Einkristallreflexen gelo È st. Sie besteht aus einer komplexen Anordnung von Aluminium-und Kupfer-Fluoridpolyedern, na Èmlich regula È ren [AlF 6 ]-und stark verzerrten [CuF 6 ]-Oktaedern, trigonalen Prismen [CuF 6 ] und zweikernigen Bausteinen [Cu 2 F 10 ], die entweder aus zwei Oktaedern oder Oktaeder und trigonalem Prisma durch Kantenverknu È pfung gebildet werden. Die genannten Einheiten sind in Ebenen organisiert, die etwa zwei Oktaeder dick sind und eine Folge von Schichten senkrecht zur [100]-Richtung der Zelle bilden. Jede Schicht ist aus verzerrten Polyedern aufgebaut, die u È ber Kanten und Ecken zu unendlichen Ketten verknu È pft sind. Die Querverbindung der Ketten erfolgt u È ber die Ecken von Polyedern, die zu viert oder sechst Blo È cke bilden, bestehend aus [AlF 6 ]-Oktaedern und Einheiten von [Cu 2 F 10 ] oder [CuF 6 ]. Die Bariumionen sind mit Koordinationszahlen von 10 bis 14 in die Schichten eingebettet und besorgen den Ladungsausgleich.

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The Crystal Structure of Ba2Cu2AlF11: a New Structure Type in Copper Fluoride Crystal Chemistry

Cited by 12 publications

References 3 publications

The Crystal Structure of Ba5Cu2Al3F23: A Complex Barium, Copper, Aluminum Fluoride, with Copper (II) in Trigonal Prismatic Environment

The Crystal Structure of Ba5Cu2Al3F23: A Complex Barium, Copper, Aluminum Fluoride, with Copper (II) in Trigonal Prismatic Environment

Multi-Photon Phosphor Feasibility Research

The Ternary System BaF2/CuF2/AlF3 and the Crystal Structure of Ba45Cu28Al17F197

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