Studies on etching of neutron-irradiated calcium fluoride single crystals
Abstract
Good quality natural crystals of calcium fluoride obtained from Amba Dungar mines of Chhota Udepur, Gujarat State, India, were cleaved, and a number of matched pairs were obtained. One piece from each pair was irradiated with different doses of neutrons in the swimming-pool Aspara Reactor at Trombay, India. After irradiation, the irradiated and their non-irradiated counterparts were matched. They were then etched simultaneously in 0.28 N perchloric acid for the same period. The etch patterns produced were studied optically. They were successively etched for three different periods, and the sizes and the depths of the pits on the nonirradiated and irradiated cleavages were measured. It is observed that (i) the irradiated cleavages etch at a faster rate than non-irradiated cleavages and, (ii) the rate of etching increases with increase in the dose of irradiation.
A crystal plate 3.86 mm thick, irradiated with a dose of 1.3 · 1010 n/cm2, was selected and cleaved into five thinner plates. All of them were etched simultaneously for the same period and the etch rate measured on them. As one proceeds within the body of the crystal it is observed that the etch rates on the faces increase with increase in the distance from the outer surface. The implications are discussed.
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- 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
- Weighting function in crystal-structure analysis*
- Tetrahedral metal groups in Fe2B and Mn4B structures
- Antisymmetrische OD-Strukturen
- Studies on etching of neutron-irradiated calcium fluoride single crystals
- Matrix methods in Fourier summations
- Electron-optical studies of etch patterns on calcium fluoride
- Structure of etch pattern at helical dislocations in NaCl single crystals
- Crystal structure of l(+)-cysteine hydrochloride monohydrate*
- Eighth International Congress of Crystallography
- Intercongress Meeting, 1968
Articles in the same Issue
- 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
- Weighting function in crystal-structure analysis*
- Tetrahedral metal groups in Fe2B and Mn4B structures
- Antisymmetrische OD-Strukturen
- Studies on etching of neutron-irradiated calcium fluoride single crystals
- Matrix methods in Fourier summations
- Electron-optical studies of etch patterns on calcium fluoride
- Structure of etch pattern at helical dislocations in NaCl single crystals
- Crystal structure of l(+)-cysteine hydrochloride monohydrate*
- Eighth International Congress of Crystallography
- Intercongress Meeting, 1968
