1. |
Dislocations in air — annealed and hydrogen — annealed corundum |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 1-3
Jiří Kvapil,
Preview
|
PDF (140KB)
|
|
ISSN:0023-4753
DOI:10.1002/crat.19710060121
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
2. |
Heterovalent substitution and oxygen nonstoichiometry of barium titanate and hematite single crystals |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 5-9
Joeef Nov́ak,
Preview
|
PDF (181KB)
|
|
ISSN:0023-4753
DOI:10.1002/crat.19710060122
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
3. |
Zur Bildung von Adsorptionsmischkristallen |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 7-16
U. Steinike,
Preview
|
PDF (540KB)
|
|
摘要:
AbstractDurch Untersuchungen an den Systemen KCl‐H2O‐Fremdstoff und NH4Cl‐H2O‐Fremdstoff konnte die Vorstellung über die Bildung von Adsorptionsmischkristallen erweitert werden. Es wurden eine Reihe spezifischer Eigenschaften komplexer Mischsysteme fest
ISSN:0023-4753
DOI:10.1002/crat.19710060103
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
4. |
A contribution to the determination of the deviation from the oxygen stoichiometry of barium titanate single crystals |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 11-15
N. Hlasivcová,
P. Coufová,
J. Novák,
Preview
|
PDF (156KB)
|
|
ISSN:0023-4753
DOI:10.1002/crat.19710060123
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
5. |
Untersuchung der gesetzmäßigen Verteilung Kleinster Fremdsubstanzmengen zwischen wachsenden KCl‐Kristallen und der Lösung (Bildung echter Mischkristalle) |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 17-31
U. Steinike,
Preview
|
PDF (689KB)
|
|
摘要:
AbstractEs wurde die Verteilung zweiwertiger Schwermetallionen zwischen wachsenden KCl‐Kristallen und den gesättigten Lösungen untersucht. Die Schwermetallionen werden unter gleichzeitiger Bildung einer Kationenleerstelle auf K+‐Gitterplätze eingebaut. Der von den experimentellen Bedingungen abhängige Verteilungskoeffizient ist bei der Bildung echter Mischkristalle im allgemeinen konstant. Gefundene Abweichungen bei KCl: Cd2+‐Kristallen werden diskutiert. Die Größe des Verteilungskoeffizienten und damit die Tendenz zum Einbau nimmt mit steigender Abweichung der Ionenradien vom K+‐Radius ab. Für den Einbau ins Gitter ist nicht allein ausschlaggebend die Kationengröße. Die Art des Anions des zugesetzten Schwermetallsalzes i
ISSN:0023-4753
DOI:10.1002/crat.19710060104
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
6. |
A study of the rate‐controlling stage of the process of crystal growth in solutions |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 33-38
G. Bliznakov,
E. Kirkova,
R. Nikolayeva,
Preview
|
PDF (264KB)
|
|
摘要:
AbstractThe effective activation energies of crystal growth on the faces (100) of KCl, KBr, and KI crystals in water solutions have been determined. The values obtained have been compared with the respective crystal lattice energies according to Sletter and Mayer, as well as with the experimental ones. The activation energies of crystal growth are in strictest linear dependence on the heats of dehydration of the ions. This shows that the dehydration of the ions is most probably the rate‐controlling stage of the process of crystal growth in solutions. This concept is supported by the results of an experimental study of the rates of growth on the faces (111) and (100) of NaClO3crystal
ISSN:0023-4753
DOI:10.1002/crat.19710060105
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
7. |
The crystallisation of alkaline‐earth metal tungstates (molybdates, chromates, and sulphates) from metal chloride melts |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 39-51
A. Packter,
B. N. Roy,
Preview
|
PDF (433KB)
|
|
摘要:
AbstractThis paper presents studies on the crystallisation of alkaline‐earth metal tungstates, molybdates, chromates and sulphates by slow cooling of solutions in lithium chloride and alkaline‐earth metal chloride melts at 600° to 1100°C. Solubility — temperature diagrams were prepared for this temperature range. The effects of solute — solvent interaction, crystallisation temperature range and rate of cooling on crystal form and size were investigated. Final crystal size increases with reduced rate of cooling and with increasing crystallisation temperature; barium sulphate crystallisation from lithium chloride melt is
ISSN:0023-4753
DOI:10.1002/crat.19710060106
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
8. |
Züchtung und Eigenschaften von Mangan‐, Kobalt‐und Zinkmanganatkristallen |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 53-57
D. R. Petzold,
Preview
|
PDF (293KB)
|
|
摘要:
AbstractCrystals of the manganates of manganese, cobalt, zinc have been grown from a flux solution of PbO‐PbF2by slow cooling. Their lattice constants are compared with dates of sintered products (from literature). It resulted by comparison of the densities obtained by X‐ray and by pycnometer that the deficit of oxygen is caused by anionic vacancies in the latt
ISSN:0023-4753
DOI:10.1002/crat.19710060107
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
9. |
Gaseous control of vapour concentration in crystal synthesis from the vapour phase |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 59-64
B. M. Bulakh,
G. S. Pekar,
Preview
|
PDF (260KB)
|
|
摘要:
AbstractThe gaseous control in the crystal synthesis from the initial components is discussed. The dependences of the vapour concentrations in the growth region on inert gas flows have been calculated. It is shown that the use of additional inert gas flows conducted directly to the entries into the reaction zone makes it possible to change the vapour concentrations in the growth region rapidly and independently one from another, and these concentrations are linear with the main transport gas flows.
ISSN:0023-4753
DOI:10.1002/crat.19710060108
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|
10. |
Preparation of Ni boracite crystals by hydrothermal synthesis |
|
Kristall und Technik,
Volume 6,
Issue 1,
1971,
Page 65-68
J. C. Joubert,
J. Muller,
C. Fouassier,
A. Levasseur,
Preview
|
PDF (226KB)
|
|
摘要:
AbstractNi boracite crystals with the general formula Ni3B7I1—x(OH)xO13have been prepared by hydrothermal synthesis. The experimental conditions are given along with some characteristics of the crystals obtaine
ISSN:0023-4753
DOI:10.1002/crat.19710060109
出版商:WILEY‐VCH Verlag
年代:1971
数据来源: WILEY
|