- Solvothermal synthesis and crystal structure determination of AgBiI 4 and Ag3BiI6
-
AgBiI4 and Ag3BiI6 were synthesized by solvothermal reaction from AgI and BiI3 in diluted HI-solution (20%) at a temperature of 160°C. The greyish-black crystals grow as octahedra (AgBiI4) or hexagonal/trigonal platelets (Ag3BiI 6). AgBiI4 crystallizes in space group Fd3m with a = 1222.3(1) pm (300 K) and Z = 8 whereas Ag3BiI6 shows the space group R3m with a = 435.37(6) pm, c = 2081.0(4) pm (300 K) and Z = 1. Both crystal structures show stacking sequence abcabc... of hexagonal layers containing Iodine. Bismuth and silver are sharing octahedral sites with different mass ratio in both structures. The part of silver which could be localized varies with temperature. This behaviour indicates mobility of silver within the crystal structure. The ionic conductivity of AgBiI4 is explored. AgBiI4 and Ag3BiI6 show close structural relationship, with AgBiI4 as a variant with a higher degree of order.
- Oldag, Thorsten,Aussieker, Thomas,Keller, Hans-Lothar,Preitschaft, Christian,Pfitzner, Arno
-
-
Read Online
- CHARACTERIZATION OF As-GROWN AND IODINATED Bi2S3 THIN FILMS ON SILICON AND QUARTZ SUBSTRATES BY XRD.
-
Bi//2S//3 thin films were grown on 100 direction silicon and 001 direction quartz substrates. The as-grown samples are polycrystalline and cryptocrystalline on silicon and quartz, respectively. When iodized in iodine vapor for different times, BiI//3 is f
- Nayak,Singh,Acharya
-
-
Read Online
- Preparation and vibrational properties of BiI3 nanocrystals
-
Nanocrystalline BiI3 with average size of 10-20 nm is prepared by a hydrothermal method at 180-200 °C for the first time. The vibrational properties of as-prepared BiI3 were investigated by the Raman spectra at room temperature.
- Wang, Chunrui,Yang, Qing,Tang, Kaibin,Qian, Yitai
-
-
Read Online
- The synthesis and structural characterization of a novel Bi-Mo double cubane cluster coupled by two bridging oxygen atoms { [Mo3 (BiI3)OS3 (μ-OAc)2 (py)3]2 (μ-O)2}·2 (H2O)
-
With [Mo3 (μ3-O) (μ-S)3 (μ-OAc)2 (dtp)2 (py)] (dtp=S2P(OC2H5)2)-; OAc=OOCCH -3; py=C5H5N) as the starting material, the reaction together with BiI3 in presence of (H2O) results in a novel Bi-Mo double-cubane cluster coupled by two bridging oxygen atoms { [Mo3 (BiI3) (μ3-O) (μ3-S)3 (μ-OAc)2 (py)3]2 (μ-O)2}·2 (H2O) 2. The cluster 2 has been characterized by IR, Raman, UV-Vis, NMR and single-crystal X-ray study. A comparison is made between these results and those of the previously reported single cubane Bi-Mo cluster [Mo3 (BiI3) (μ3-S)4 (μ-OAc) (dtp)3 (py)] 1.
- Lu, Shao-Fang,Huang, Jian-Quan,Wu, Qiang-Jin,Huang, Xiao-Ying,Wu, Da-Xu,Zheng, Yu,Yu, Rong-Min
-
-
Read Online
- Solid-state equilibria and thermodynamic properties of compounds in the Bi-Te-I system
-
The Bi-Te-I system has been studied by differential thermal analysis, x-ray diffraction, and emf measurements in the temperature range 300-400 K using concentration cells of the type (-)Bi(s) | glycerol + KI + BiI3 | Bi-Te-I(s)(+). The results
- Aliev,Babanly
-
-
Read Online
- Phase equilibriums and thermodynamic properties of the system Bi-Te-I
-
The system Bi-Te-I was studied by methods of differential thermal analysis and the X-ray diffraction, and also by measurements of electromotive forces (EMF) of concentration chains of type(-) Bi (s) | liquid electrolytic conductor, Bi3+ | (Bi-T
- Babanly,Tedenac,Aliyev,Balitsky
-
-
Read Online
- Exciton Transitions in Size-Distributed BiI3 Microcrystallites Embedded in CdI3 Crystals
-
Size-distributed BiI3 microcrystallites embedded in CdI2 matrices were formed from melt-grown mixed crystals through the aggregation of BiI3 molecules by an annealing treatment at a fairly low temperature. Electronic transitions in initially existing two-molecule clusters of BiI3 were analyzed on the basis of intracation transitions of the metal. The microcrystallites of BiI3 have a disk-like shape of various radii with the unit layer thickness, which were directly observed by a high resolution electron microscope. Absorption, luminescence luminescence-excitation spectra for the microcrystallites are presented. We observed Stokes-shifted luminescence from the BiI3 microcrystallites for the first time. The magnitude of Stokes-shifts changes depending on the microcrystallite size. From the results, it is concluded that the exciton-phonon interaction becomes stronger with the decrease of the microcrystallite size.
- Kim, Dae Gwi,Karasawa, Tsutomu,Komatsu, Teruo,Kobayashi, Takashi
-
-
Read Online
- Optical properties of extrinsic two-dimensional excitons in BiI3 single crystals
-
Interface excitons caused by stacking faults in BiI3 crystals have been investigated on absorption, photoluminescence and its excitation spectra. Characteristic three sharp absorption lines (called R, S and T), appear close to the fundamental absorption edge. The temperature dependence of the line shape shows a typical feature of exciton-phonon interaction in the case that K=0 at the bottom of the exciton band. Resonant luminescences of these lines have also very narrow line widths, and no Stokes shifts can be detected. The luminescence line shape of phonon side band shows Maxwellian-like having the line width proportional to thermal energy but accompanied by a fine structure which reflects a quasi two-dimensional band nature of this exciton system. The high density excitation effects of these states reveal a specific interaction among the R, S and T excitons.
- Watanabe, Katsuyoshi,Karasawa, Tsutomu,Komatsu, Teruo,Kaifu, Yozo
-
-
Read Online
- The phase equilibria in the Bi-S-I ternary system and thermodynamic properties of the BiSI and Bi19S27I3 ternary compounds
-
Phase equilibria in the entire Bi-S-I ternary system were determined experimentally by means of differential thermal analysis (DTA), X-ray diffraction (XRD) techniques and EMF measurements. Several vertical sections, an isothermal section at 300 K, and a liquidus surface projection of the system were constructed and two ternary compounds BiSI and Bi19S 27I3 reported earlier were confirmed. The primary crystallization fields of all phases, the types and coordinates of invariant and monovariant equilibria were determined. Thermodynamic properties of the both BiSI and Bi19S27I3 ternary compounds were studied by electromotive force measurements (EMF) with the bismuth electrode. From the EMF measurements, the partial molar functions of bismuth in alloys and the standard integral thermodynamic functions of BiSI and Bi19S 27I3 were calculated.
- Aliev, Ziya S.,Musayeva, Sabina S.,Jafarli, Farhad Y.,Amiraslanov, Imamaddin R.,Shevelkov, Andrei V.,Babanly, Mahammad B.
-
-
Read Online
- Syntheses, crystal structures, and triple twinning of the cluster trimers Bi2[PtBi6Br12]3 and Bi 2[PtBi6I12]3
-
Melting reactions of Bi with Pt and BiX3 (X = Br, I) yield shiny black, air insensitive crystals of the subhalides Bi2[PtBi 6X12]. Bi2[PtBi6Br 12]3 crystallizes in the monoclinic space group C2/m with lattice parameters a = 1617.6(2) pm, b = 1488.5(1) pm, c = 1752.4(2) pm, and β = 110.85(4)°. Bi2[PtBi6I12] 3 adopts the triclinic space group C1 with pseudo-monoclinic lattice parameters a = 1711.2(2) pm, b = 1585.1(1) pm, c = 1865.7(2) pm, and α = 90°, β = 111.15(4)°, γ = 90°. The two homoeotypic compounds consist of cuboctahedral [Pt-IIBiII 6X-I12]2- clusters that are concatenated into linear trimers by BiIII atoms. The ordered distribution of BiIII atoms destroys the inherent threefold rotation axes in the packing of cluster anions. As a consequence of the pseudosymmetry the crystals are triple twinned along [201]. Due to different orientations of the cluster trimers there are two BiII·X inter-cluster bridges per BiII atom in Bi2[PtBi6Br 12]3 but only one bridge in Bi2[PtBi 6I12]3. The structure of the iodine compound can be deduced from the NaCl structure type, leaving 37 of 96 atomic positions unoccupied. The arrangement of the cuboctahedral clusters follows the motif of a body-centered cubic packing.
- Guenther, Anja,Steden, Folker,Ruck, Michael
-
p. 423 - 430
(2009/03/11)
-
- New solid solutions based on Bi10M3X18 and Bi6X7 (M = Zr, Hf; X = Cl, Br)
-
The Bi10Hf3Cl18-xBr, and Bi 10Zr3Cl18-xBrx(x = 4.5, 9, 13.5) and Bi6Cl7-xBrx (x = 1.75, 3.5, 5.25) solid solutions containing Bi95+ homopolycations and mixed chloride-bromide anions have been obtained by the ampoule method. The unit cell parameters of these samples have been determined. The unit cell parameters are a linear function of the percentage (at. %) of the substituted chlorine, which indicates that these systems form a continuous series of solid solutions. Analogous solid solutions Bi10Hf3Br18-xI x and Bi10Zr3Br18-xIx (x = 4.5, 9, 13.5) are not formed.
- Savilov,Kuznetsov,Donets,Popovkin
-
p. 335 - 338
(2008/10/08)
-
- Investigations on the pseudobinary system Bi2Se3/BiI3
-
The phase diagram of the pseudobinary system Bi2Se3/BiI3 was investigated by DTA, total pressure measurements and x-ray phase analysis. Only BiSeI exist as a ternary phase in this system. The compound melts incongruently at 545°C. Heat of formation and standard entropy were calculated from vapor pressure data. ΔHoB(BiScI, f, 298) = (-23.4 ± 1.9) kcal/mol So(BiSeI, f, 298) = (38.7 ± 3.5) cal/K · mol.
- Petasch,G?bel,Oppermann
-
p. 1767 - 1770
(2008/10/09)
-
- Properties and reactions of tris(2,6-difluorophenyl)bismuth(III) and tris(2,6-difluorophenyl)bismuth(V) derivatives
-
(2,6-F2C6H3)3BiF2 and (2,6-F2C6H3)3BiCl2 are prepared oxidizing (2,6-F2C6H3)3Bi with XeF2
- Lewe,Naumann,Nowicki,Schneider,Tyrra
-
p. 122 - 128
(2008/10/09)
-
- Preparation and properties of dibismuthines
-
Tetramethyldibismuthine, 1, tetraisopropenyldibismuthine, 15, 1,1′-bibismolane, 16, and tetrakis(2-methyl-1-propenyl)dibismuthine, 17, have been prepared from the reaction of the corresponding tertiary bismuthines with sodium in liquid ammonia followed by treatment with 1,2-dichloroethane. Tetraphenyldibismuthine, 4, was prepared by an analogous route from diphenylbismuth chloride. While all the dibismuthines are red in solution, 1, 15, and 16 freeze to blue solids. Compounds 4 and 17 form red solids. The Raman, UV, and mass spectra of the dibismuthines are discussed. The dibismuthines thermally decompose to form bismuth metal and corresponding tertiary bismuthine. The reactions of tetramethyldibismuthine with iodine, bromotrichloromethane, benzyl bromide, hydrochloric acid, and butyllithium have been explored. The reactions afford products in which the Bi-Bi bond has been cleaved.
- Ashe III, Arthur J.,Ludwig Jr., Edward G.,Oleksyszyn, Josef
-
p. 1859 - 1866
(2008/10/08)
-
- A reinvestigation of paneth's violet compound. the synthesis of tetramethyldlbismuthine
-
TetramethyMibisrnuthine was prepared from the reaction of trimethyibismuthine with sodium in liquid tmmonia followed by treatment with 1,2-dichloroethaoe. Like tstramethyldistibine it shows thermochromic properties on freezing.
- Ashe III, Arthur J.
-
p. 1408 - 1408
(2008/10/08)
-