JanuaryPub Date : 1988-12-31DOI: 10.1002/CRAT.2170230123
D. K. Ghosh, L. K. Samanta, G. Bhar
{"title":"Optical Properties of Some Quaternary Copper Chalcopyrites","authors":"D. K. Ghosh, L. K. Samanta, G. Bhar","doi":"10.1002/CRAT.2170230123","DOIUrl":"https://doi.org/10.1002/CRAT.2170230123","url":null,"abstract":"","PeriodicalId":14710,"journal":{"name":"January","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82195603","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}
JanuaryPub Date : 1988-12-31DOI: 10.1002/CRAT.2170230108
K. Fichtner
{"title":"OD Approach to the Polytypism in CdP2","authors":"K. Fichtner","doi":"10.1002/CRAT.2170230108","DOIUrl":"https://doi.org/10.1002/CRAT.2170230108","url":null,"abstract":"The structures of CdP2 are described as stacking sequences of layers of CdP4 tetrahedra. On the basis of the OD theory of Dornberger-Schiff, the stacking possibilities are derived and convenient stacking notations proposed. The idealized layer structure is given, the percentage of α-CdP2 for any stacking sequence defined. The symbol of the OD groupoid family is P11(n)2m · (4) x, y with parameters x = y = 1/2 and (4+), (4−) as the two alternative transformations from layer to layer. The net constants are a = b ≈ 5.29 A; the “thickness” of a layer is c0 ≈ 4.95 A. \u0000 \u0000 \u0000 \u0000Die Strukturen von CdP2 werden als Stapelfolgen von Schichten von CdP4-Tetraedern beschrieben. Auf der Grundlage der OD-Theorie von Dornberger-Schiff werden die Stapelmoglichkeiten abgeleitet und zweckmasige Polytypensymbole vorgeschlagen. Die idealisierte Schichtstruktur wird angegeben und der Prozentsatz von α-CdP2 in einer beliebigen Stapelfolge definiert. Das Symbol fur die OD-Gruppoid-Familie ist P11(n) 2m · (4) x, y mit Parametern x = y = 1/2 und (4+), (4−) als den zwei moglichen Transformationen von Schicht zu Schicht. Die Netzkonstanten sind a = b ≈ 5.29 A, die „Schichtdicke” ist c0 ≈ 4.95 A.","PeriodicalId":14710,"journal":{"name":"January","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73668473","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}
JanuaryPub Date : 1988-12-31DOI: 10.1002/CRAT.2170230125
W. Schmitz, J. Kornatowski, G. Finger
{"title":"Growth of NaX Zeolites in the Presence of Triethanolamine (TEA)","authors":"W. Schmitz, J. Kornatowski, G. Finger","doi":"10.1002/CRAT.2170230125","DOIUrl":"https://doi.org/10.1002/CRAT.2170230125","url":null,"abstract":"","PeriodicalId":14710,"journal":{"name":"January","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73974916","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}
JanuaryPub Date : 1988-12-31DOI: 10.1002/CRAT.2170230111
M. Schenk, H. Berger, A. Klimakow, M. Mühlberg, M. Wienecke
{"title":"Nonstoichiometry and Point Defects in PbTe","authors":"M. Schenk, H. Berger, A. Klimakow, M. Mühlberg, M. Wienecke","doi":"10.1002/CRAT.2170230111","DOIUrl":"https://doi.org/10.1002/CRAT.2170230111","url":null,"abstract":"The nostoichiometry and point-defect structure of PbTe was investigated by various methods including carrier-concentration, lattice-constant, positron-annihilation and vapour-density measurements. The results are discussed in comparison with data published by other authors. New aspects are obtained especially from high-temperature experiments. A model of nonstoichiometry and defect structure in PbTe is proposed. The stability region of PbTe is essentially broader than reported until now. The disorder takes place mainly in the Pb sublattice, i.e., there occur charged Pb vacancies (Te-rich) and Pb interstitials (Pb-rich), respectively, as well as probably additional neutral Pb interstitials in Pb-rich PbTe. \u0000 \u0000 \u0000 \u0000Die Nichtstochiometrie und Punktdefektstruktur von PbTe wurde mit verschiedenen Methoden untersucht, u. a. durch Messungen der Ladungstragerkonzentration, der Gitterkonstante, der Positronenannihilation sowie der Dampfdichte. Die Ergebnisse werden mit denen anderer Autoren verglichen. Neue Aspekte ergeben sich insbesondere aus Hochtemperaturmessungen. Ein Modell der Nichtstochiometrie und der Defektstruktur in PbTe wird vorgeschlagen. Das Stabilitatsgebiet von PbTe ist wesentlich breiter als bisher berichtet. Die Fehlordnung tritt hauptsachlich im Pb-Untergitter auf, d. h., es existieren geladene Pb-Leerstellen (Te-reich) bzw. Pb-Zwischengitterionen (Pb-reich) sowie zusatzlich wahrscheinlich neutrale Pb-Zwischengitteratome in Pb-reichem PbTe.","PeriodicalId":14710,"journal":{"name":"January","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83846662","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}
JanuaryPub Date : 1988-12-31DOI: 10.1515/9783112485606-004
H. Görls, B. Schulz, U. Rosenthal, W. Schulz
{"title":"Crystal and Molecular Structure of (2-3-n-2-Butyne-l,4-diol)-bis-(triphenylphosphan)- nickel(O) Ni{[(C6H5)3P]2 (C4H6O2)}","authors":"H. Görls, B. Schulz, U. Rosenthal, W. Schulz","doi":"10.1515/9783112485606-004","DOIUrl":"https://doi.org/10.1515/9783112485606-004","url":null,"abstract":"","PeriodicalId":14710,"journal":{"name":"January","volume":"176 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82983595","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}
JanuaryPub Date : 1988-12-31DOI: 10.1515/9783112485606-002
B. Schumann, A. Tempel, G. Kühn
{"title":"Epitaxy of AIBIIICVI\u0000 2 Semiconductors","authors":"B. Schumann, A. Tempel, G. Kühn","doi":"10.1515/9783112485606-002","DOIUrl":"https://doi.org/10.1515/9783112485606-002","url":null,"abstract":"","PeriodicalId":14710,"journal":{"name":"January","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91071388","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}
JanuaryPub Date : 1988-12-31DOI: 10.1002/CRAT.2170230109
G. Wagner, V. Gottschalch
{"title":"Revealing of Lattice Defects on (111) Faces of Gallium Phosphide and Indium Phosphide by Chemical Etching","authors":"G. Wagner, V. Gottschalch","doi":"10.1002/CRAT.2170230109","DOIUrl":"https://doi.org/10.1002/CRAT.2170230109","url":null,"abstract":"A solution is presented suitable for revealing lattice defects on (111) phosphorous faces of GaP and InP. It is possible to distinguish between pits originated by grown-in dislocations and microdefects such as perfect loops, faulted loops and precipitates and/or inclusions. Moreover it is also possible to reveal large stacking faults of Shockley type and microtwin lamellae. One to one correlations have been given by means of transmission electron microscopy. \u0000 \u0000 \u0000 \u0000Es wird eine neue Losung vorgestellt, die auf (111) Flachen von GaP und InP Gitterdefekte anazt. Es ist moglich zwischen Versetzungen und Mikrodefekten wie vollstandigen Versetzungsringen, unvollstandigen Versetzungsringen sowie Ausscheidungen und/oder Einschlussen zu unterscheiden. Neben ausgedehnten Stapelfehlern vom Shockley-Typ werden auch Mikrozwillingslamellen und Korngrenzen angeatzt. Eine exakte Korrelation der verschiedenen Atzerscheinungen mit den entsprechenden Gitterdefekten erfolgte mittels Transmissionselektronenmikroskopie.","PeriodicalId":14710,"journal":{"name":"January","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86957050","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}
JanuaryPub Date : 1988-12-31DOI: 10.1002/CRAT.2170230122
L. Pramatarova, E. Savova, G. Minchev, M. Mihailov
{"title":"Preparation of GaAs Substrates for MBE","authors":"L. Pramatarova, E. Savova, G. Minchev, M. Mihailov","doi":"10.1002/CRAT.2170230122","DOIUrl":"https://doi.org/10.1002/CRAT.2170230122","url":null,"abstract":"","PeriodicalId":14710,"journal":{"name":"January","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86030980","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}
JanuaryPub Date : 1988-12-31DOI: 10.1515/9783112485606-015
W. Schmitz, P. Schreiter
{"title":"X-ray Determination of Solid Solution Composition in the Melilite System Äkermanite (AK) — Gehlenite (Ge) - Soda Melilite (Sm)","authors":"W. Schmitz, P. Schreiter","doi":"10.1515/9783112485606-015","DOIUrl":"https://doi.org/10.1515/9783112485606-015","url":null,"abstract":"","PeriodicalId":14710,"journal":{"name":"January","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81476013","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}
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