| | 1 | Author
| | Requires cookie* | | | Title
| IR Spectrum of Scandium Orthovanadate1  | | | | Abstract
| M a r t a E . E s c o b a r und E n r i q u e J. B a r a n The infrared spectrum of ScYO4 is reported and discussed in comparison with those of YVO4 and of the lighter lanthanide ortho-vanadates. In order to facilitate the vibra tional assignment the spectra of a series of solid solutions of the type Sc(V0 4)i_w(P0 4)n are also measured and analyzed. | | | |
Reference
| (Z. Naturforsch. 32b, 349—350 [1977]; eingegangen am 6. Dezember 1976) | | | |
Published
| 1977 | | | |
Keywords
| Scandium Orthovanadate, IR, Solid Solutions | | | |
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| default:Reihe_B/32/ZNB-1977-32b-0349_n.pdf | | | | Identifier
| ZNB-1977-32b-0349_n | | | | Volume
| 32 | |
| 2 | Author
| Roger Blachnik, Peter Lönnecke, Jürgen Nuß | Requires cookie* | | | Title
| Gläser und Verbindungen im System P4S4-A s 4S4-A s 4Se4-P 4Se4 Glass and Com pounds in the System P4S4-A s 4S4-A s 4Se4-P 4Se4 | | | | Abstract
| Glas forming regions and glass temperatures o f the system P4S4-A s 4S4-A s 4Se4-P 4Se4 have been determined by thermoanalytical and X-ray methods. In the whole system crystalline sam ples have been obtained by annealing. From the pure phases A s4S4 and P4Se4 broad regions o f solid solutions extend into the system. In the P4S4 corner the form ation o f A 4B3 (A = P, As; B = S, Se) molecules is observed. As with A 4B3 m olecules, a stepwise substitution o f P by As atoms, and o f S by Se atom s is possible. All molecules o f the series P4_"As"S4 and A s4S4_"Sen (n = 0, 1, 2, 3, 4) were detected by 31P N M R and/or mass spectroscopy. | | | |
Reference
| Z. Naturforsch. 48b, 1175—1180 (1993); eingegangen am 19. Mai 1993 | | | |
Published
| 1993 | | | |
Keywords
| Phosphorus Arsenic Chalcogenides, Chalcogenide Glasses, Solid Solutions | | | |
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| default:Reihe_B/48/ZNB-1993-48b-1175.pdf | | | | Identifier
| ZNB-1993-48b-1175 | | | | Volume
| 48 | |
| 4 | Author
| V. Massarotti, D. Capsoni, M. Bini | Requires cookie* | | | Title
| S | | | | Abstract
| ta b ility o f (N i 1_ xL i x) (L i 1_ J,N iJ?) 0 2 O r d e r e d S o lid S o lu tio n The stability of ordered solid solutions (OSS) with LiNi02 structure has been studied in a wide range of the lithium cationic fraction (0.22 < xt < 0.42). The OSS is obtained from the reactive system Ni0/Li2C 03 at 800 °C starting with high nominal lithium content (xt = 0.5). By analysis of the decrease of x, observed after annealing, during which evaporation and a contact reaction occurs, structure-composition relationships can be obtained. The transformation of the ordered phase, due to a cation exchange process, is observed for xt < 0.31 by accurate X-Ray powder pattern analysis (Rietveld method). By increasing the annealing time (decreasing lithium content), the data can be explained on the basis of progressive formation of the simple solid solution (SSS) with only one cation site and halved c axis value. The variations of structural parameters during the transformation are compared with those reported in the litera ture. The coherence domains of the OSS become smaller and the phase percentage decreases, while the SSS percentage increases. The rate of such a process can be well described on the basis of a two dimensional diffusion mechanism. | | | |
Reference
| Z. Naturforsch. 50a, 155—168 (1995); received November 21 1994 | | | |
Published
| 1995 | | | |
Keywords
| Lithium Nickel Oxides, Solid state reaction, Solid solution, Order-Disorder Transfor mation | | | |
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| default:Reihe_A/50/ZNA-1995-50a-0155.pdf | | | | Identifier
| ZNA-1995-50a-0155 | | | | Volume
| 50 | |
| 5 | Author
| A. M. Raevsky, G. K. Semin, T. L. Khotsyanova | Requires cookie* | | | Title
| 3 5 C I N Q | | | | Abstract
| R o f I m p u r ity M o le c u le s o f T e tra c h lo r id e s o f G ro u p IV E le m e n ts in M a t r i x C r y s ta ls o f G ro u p I V E le m e n t H a lid e s 35C1 NQR spectra of the impurity molecules E'C14 (1.5-5% mol) (E' = C, Si, Ge, Sn) in the matrix crystals of Group IV tetrachlorides EC14 (E = Si, Ge, Sn, Ti) have been measured at 77 K. The mixtures of the above components are substitution solid solutions. Changes in the 35C1 NQR spectra of the impurity molecules have been analysed as to packing factors and nearest environment. | | | |
Reference
| Z. Naturforsch. 50a, 606—610 (1995); received December 8 1994 | | | |
Published
| 1995 | | | |
Keywords
| NQR, 35C1, solid solutions, tetrachlorides of Group IV elements | | | |
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| default:Reihe_A/50/ZNA-1995-50a-0606.pdf | | | | Identifier
| ZNA-1995-50a-0606 | | | | Volume
| 50 | |
| 6 | Author
| H. Haeuseler, A. Cansiz | Requires cookie* | | | Title
| Die quaternären Systeme ZnAl2S4-ZnGa2S4, ZnAl2S4-CdAl2S4 und ZnAl2S4-ZnAl2Se4. Röntgenographische und schwingungsspektroskopisehe Untersuchungen Investigation of the Quaternary Systems ZnAl2S4-ZnGa2S4, ZnAl2S4-CdAl2S4, and ZnAl2Se4-ZnAl2Se4 by X-Ray Diffraction and Vibrational Spectroscopy | | | | Abstract
| The quasi-binary systems Zni_a:Cda;Al2S4, ZnAl^i-zjGao.^, and ZnAl2S4(i_a;)Se4:r have been investigated by X-ray diffraction and vibrational spectroscopy. In the spinel Z11AI2S4 up to 20% of Zn can be replaced by Cd. In the two other systems, ZnAl2S4 has no detectable homogeneity range. The thiogallate phases have much broader ranges of homogeneity. The compositions of the compounds at the phase boundary of the thiogallate phase are Zno.4Cdo.6Al2S4, ZnGao.4Alx.6S4, and ZnAl2S2.8Sei.2. At approximately 950 °C ZnAl2Se4 undergoes a reversible phase transition to a wurtzite-type structure. This phase transition is also observed for the solid solutions ZnAl2S4(i_a;)Se4a; with 1.0 > x > 0.3. The FIR spectra are discussed. | | | |
Reference
| Z. Naturforsch. 38b, 311—316 (1983); eingegangen am 27. Oktober 1982 | | | |
Published
| 1983 | | | |
Keywords
| Spinel, Thiogallate Type, Wurtzite Type, FIR Spectroscopy, Solid Solution | | | |
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| default:Reihe_B/38/ZNB-1983-38b-0311.pdf | | | | Identifier
| ZNB-1983-38b-0311 | | | | Volume
| 38 | |
| 7 | Author
| G. K. Semin, A. M. Raevsky, S. I. Kuznetsov, T. L. Khotsyanova, S. I. Gushchin | Requires cookie* | | | Title
| Br NQR Spectra of the Impurity Molecules of Tetrabromides of Group IV Elements in the Matrix Crystals of Group IV Element Halides | | | | Abstract
| Changes in 79 Br NQR spectra of the impurity molecules EBr4 (2-5% mol) (E = C, Si, Ti, Ge, Sn) in the matrix crystals of group IV element tetrahalides EHal4 (E = Si. Ti, Ge, Sn; Hal = CI, Br) were studied at 77 K. The mixtures of these components are substitution solid solutions (SS), which was proved by the appearance of characteristic satellites in the NQR spectra of the matrix crystals. Changes in the Br NQR spectra of the impurity molecules were analyzed from the viewpoint of packing factors and the type of nearest environment. In the temperature range 77-270 K an abnormal temperature dependence of the 79 Br NQR frequencies of TiBr4 impurity in SiBr4 matrix was observed for both lines of the cubic phase. The temperature dependence of the 79 Br NQR frequencies of SiBr impurity in TiBr4 matrix is normal. | | | |
Reference
| Z. Naturforsch. 47a, 111—116 (1992); received December 18 1991 | | | |
Published
| 1992 | | | |
Keywords
| 79, 81 Br NQR, Solid solutions, Group IV element tetrahalides, Temperature depen-dence of NQR frequencies | | | |
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| default:Reihe_A/47/ZNA-1992-47a-0111.pdf | | | | Identifier
| ZNA-1992-47a-0111 | | | | Volume
| 47 | |
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