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Disorder phenomenon in cadmium iodide crystals
Veröffentlicht/Copyright:
28. Juli 2010
Abstract
On account of stacking faults occuring during growth, the cadmium iodide crystals are very frequently found to be disordered, showing ‘streaking’ on the x-ray diffraction photographs. The degree of disorder, α, of twenty CdI2 polytypes has been evaluated according to Jagodzinski's theory of one-dimensional disorder based on the vibration entropy of crystals. The frequency-distribution curve of the polytypes shows two maxima, one for α ∼ 0.06 and the other for α ∼ 0.28. The results are in agreement with those from a similar investigation made by Jagodzinski in silicon carbide, thus confirming that vibration entropy is the decisive factor in the explanation of polytypism phenomenon in crystals.
Published Online: 2010-07-28
Published in Print: 1968-01
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Artikel in diesem Heft
- A special case of two-dimensionally disordered crystals
- Die Kristallstruktur des Koenenits, eine Doppelschichtstruktur mit zwei inkommensurablen Teilgittern
- Zur Indizierung von Pulverdiagrammen tetragonaler und hexagonaler Substanzen
- Etch patterns on apophyllite basal cleavages
- Die Kristallstruktur von Li2(Si0,25Ge0,75)2O5
- The crystal structure of LiAlSi2O6-II (“β spodumene”)
- Phase solution of para-chlorophenol
- Crystal structure of an eighteen-layered polytype of cadmium iodide
- X-ray diffraction effects by non-ideal crystals of biotite, muscovite, montmorillonite, mixed-layer clays, graphite, and periclase*
- The crystal structure of alamosite, PbSiO31
- Sauerstoff als Koordinationszentrum in Kristallstrukturen
- Low-iron polymorphs in the pyrrhotite group
- Revised crystal structure of dehydrated Na-Type A zeolite
- Verfeinerung der Tl2O3-Struktur mittels Neutronenbeugung
- The location of hydrogen atoms in crystalline ionic hydrates
- Disorder phenomenon in cadmium iodide crystals
- Crystal structure of single-layer lizardite
- Proof that the pgg packing of ellipses has never the maximum density
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