European Journal of Solid State and Inorganic Chemistry最新文献_第3页

The luminescence of VO43− ions in Ca2PO4Cl VO43−离子在Ca2PO4Cl中的发光

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80025-8

A. Belletti, R. Borromei, E. Cavalli, L. Oleari

{"title":"The luminescence of VO43− ions in Ca2PO4Cl","authors":"A. Belletti, R. Borromei, E. Cavalli, L. Oleari","doi":"10.1016/S0992-4361(98)80025-8","DOIUrl":"10.1016/S0992-4361(98)80025-8","url":null,"abstract":"<div>The emission spectra of both single crystals and polycrystalline samples of Ca2PO4Cl “doped” with VO43− have been measured at several temperatures from 10 K to room temperature. In both a wide emission band has been observed within the range 16000–28000 cm−1. This band shows two components, which behave differently with temperature. The deconvolution of the decay curves, expressed in terms of a linear combination of exponentials, requires three exponentials below 250 K. The relative lifetimes are 3700 μs, 1800 μs and 250 μs at 10 K. The emission wide band is assigned to a triplet → singlet transition connected to a transfer of an electron from a molecular orbital mainly localized on one oxygen atom (2pπ type) to a molecular orbital mainly localized on the vanadium atom (de, or di2 type). The lifetimes of the single crystal and of the polycrystalline samples are rather close. However there is evidence of a somewhat different behaviour of the two kinds of samples with temperature.</div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 6","pages":"Pages 483-493"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80025-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84324417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Synthesis of nanometric chromium (III) oxide powders in supercritical alcohol 超临界醇法制备纳米氧化铬粉体

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80019-2

L. Znaidi, C. Pommier

引用次数: 9

Synthesis and crystal structure of (1,6-NH3C6H12NH3)2(1-NH3C10H7)2P6O18.2H2O (1,6- nh3c6h12nh3)2(1- nh3c10h7)2P6O18.2H2O的合成与晶体结构

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80023-4

H. Marouani, M. Rzaigui, M. Bagieu-Beucher

{"title":"Synthesis and crystal structure of (1,6-NH3C6H12NH3)2(1-NH3C10H7)2P6O18.2H2O","authors":"H. Marouani, M. Rzaigui, M. Bagieu-Beucher","doi":"10.1016/S0992-4361(98)80023-4","DOIUrl":"10.1016/S0992-4361(98)80023-4","url":null,"abstract":"<div>Synthesis and complete structural characterization by X-ray diffraction, DTA, GTA and IR are given for a new cyclohexaphosphate: (1,6-NH3C6H12NH3)2 (1-NH3C10H7)2P6O18.2H2O. This compound is monoclinic P21/c with the following unit-cell parameters: a = 11.861(2)Å, b = 10.104(1)Å, c = 19.664(6)Å, β = 96.44(2)°, and Z = 2. The crystal structure has been solved and refined to R = 0.033 using 3928 independent reflections. The atomic arrangement can be described as layer organisation. Layers built by P6O18 ring anions and water molecules spread in the plans (100). Between these layers are located the organic groups which form hydrogen bonds with oxygen atoms of P6O18 rings and water molecules. Geometrical characteristics of hydrogen bonds are described. The reported IR study is supported by a delaited theoretical group analysis applied to P6O18 with D6h ideal local symmetry.</div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 6","pages":"Pages 459-471"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80023-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79676778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Mn(V) polyhedron size in Ba10((P,Mn)O4)6F2: vibrational spectroscopy and EXAFS study Ba10((P,Mn)O4)6F2中Mn(V)多面体尺寸:振动光谱和EXAFS研究

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80020-9

K. Dardenne , D. Vivien, F. Ribot, G. Chottard, D. Huguenin

{"title":"Mn(V) polyhedron size in Ba10((P,Mn)O4)6F2: vibrational spectroscopy and EXAFS study","authors":"K. Dardenne , D. Vivien, F. Ribot, G. Chottard, D. Huguenin","doi":"10.1016/S0992-4361(98)80020-9","DOIUrl":"10.1016/S0992-4361(98)80020-9","url":null,"abstract":"<div>This paper reports the study of manganese substituted barium fluoroapatite Ba10(P1−xMnxO4)6F2 with 0 ≤ × ≤ 0.20. X-rays diffraction investigation indicates that the phosphate-manganate solid solution is complete, at least for this composition range, and follows Vegard's law, while diffuse reflectance and fluorescence spectra confirm that Mn(V) substitutes for P(V) in the barium apatite lattice. EXAFS experiment, at the manganese K edge, performed on the x = 0.2 compound, indicates that the Mn(V)-O distance is 1.73 Å, a much larger value than the P-O distance equal to 1.54 Å.The (MnO4)3− vibrational mode frequencies, deduced from the IR and Raman spectra are almost independent of the x value. This indicates that, even at very low manganese content (x = 0.001), the Mn-O distance is also very close to 1.73 Å.The Mn(V) ion distorts the barium apatite lattice to a large extent when it substitutes for P(V) and imposes its own size to the host sites.</div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 6","pages":"Pages 419-431"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80020-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81357701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Growth of KY(WO4)2 single crystal: investigation of the WO3 rich region in the K2O-Y2O3-WO3 ternary system. 2 — The KY(WO4)2 crystallisation field KY(WO4)2单晶的生长:k20 - y2o3 -WO3三元体系中WO3富集区的研究。2 - KY(WO4)2结晶场

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80021-0

E. Gallucci, C. Goutaudier, G. Boulon, M.T. Cohen-Adad

{"title":"Growth of KY(WO4)2 single crystal: investigation of the WO3 rich region in the K2O-Y2O3-WO3 ternary system. 2 — The KY(WO4)2 crystallisation field","authors":"E. Gallucci, C. Goutaudier, G. Boulon, M.T. Cohen-Adad","doi":"10.1016/S0992-4361(98)80021-0","DOIUrl":"10.1016/S0992-4361(98)80021-0","url":null,"abstract":"<div>In order to determinate the best crystal growth conditions for KY(WO4)2 single-crystals, the investigation of the K2O-Y2O3-WO3 ternary system was undertaken by the study of three isoplethic sections (K2W4O13-Y2O3, K2WO4-KY(WO4)2, K2W2O7-KY(WO4)2). The stability domain and the crystallisation field of the compound were then defined: KY(WO4)2 is not stoichiometric and melts congruently for the composition 0.81(K2O.4WO3)−0.19Y2O3 The low temperature phase belongs to the monoclinic system (s.g. C2/c) with a=10.65(1)Å, b=10.34(1)Å, c=7.54(1)Å, β=130.5(1)°. Its crystallisation field was delimited in temperature and composition: an α-KY(WO4)2 crystal can grow if xY2O3≤0.175.</div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 6","pages":"Pages 433-445"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80021-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79199578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Preparation of impurity-free zeolites from coal-mine schists 用煤矿片岩制备无杂质沸石

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80022-2

J.E. Gilbert, A. Mosset

引用次数: 2

Crystal structure of the arsenate NaNb4O9AsO4. A framework structure with diffusion pathways 砷酸盐NaNb4O9AsO4的晶体结构。具有扩散路径的框架结构

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80024-6

N. Bestaoui, A. Verbaere, Y. Piffard, V. Coulibaly, J. Zah-Letho

引用次数: 7

Rare-earth-doped cadmium-based chlorofluoride glasses with improved durability 提高耐用性的稀土掺杂镉基氟氯化玻璃

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80027-1

J.L. Adam, C. Ricordel, B. Boulard

引用次数: 6

Crystallization of ultraphosphates via the gas phase. The crystal structures of FeP4O11, ZnP4O11 and CdP4O11 超磷酸盐的气相结晶。研究了FeP4O11、ZnP4O11和CdP4O11的晶体结构

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80026-X

M. Weil, R. Glaum

{"title":"Crystallization of ultraphosphates via the gas phase. The crystal structures of FeP4O11, ZnP4O11 and CdP4O11","authors":"M. Weil, R. Glaum","doi":"10.1016/S0992-4361(98)80026-X","DOIUrl":"10.1016/S0992-4361(98)80026-X","url":null,"abstract":"<div>The new ultraphosphates FeP4O11, ZnP4O11 and CdP4O11 of the CuP4O11 structure type were synthesized from the corresponding meta- or polyphosphates and P4O11. Crystallization via the gas phase has been achieved at elevated temperatures using a mixture of P (3 mg) and I2 (50 mg) as mineralizer. The crystal structure consists of a two-dimensional phosphate network, built from four crystallographically independent 10-membered polyphosphate rings. Each ring contains four secondary and six tertiary PO4-groups. Two crystallographically independent metal sites showing sixfold coordination by terminal oxygen atoms are located inbetween the phosphate layers. FeO6-octahedra (2.028(3) Å < d̄ FeO6 < 2.268(3) Å) and ZnO6 octahedra (2.002(2) Å < d̄ ZnO6 < 2.256(2) Å) exhibit slightly larger radial distortion than the CdO6-octahedra (2.215(7) Å < d̄ CdO6 < 2.383(3) Å).</div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 6","pages":"Pages 495-508"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80026-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85764688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Crystal structure determination of AlVMoO7 from X-ray powder diffraction data 用x射线粉末衍射数据测定AlVMoO7的晶体结构

European Journal of Solid State and Inorganic Chemistry Pub Date : 1998-06-01 DOI: 10.1016/S0992-4361(98)80028-3

K. Knorr, P. Jakubus, G. Dabrowska, M. Kurzawa

引用次数: 6