Digitale Medien
Copenhagen
:
International Union of Crystallography (IUCr)
Applied crystallography online
3 (1970), S. 38-44
ISSN:
1600-5767
Quelle:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Thema:
Geologie und Paläontologie
,
Physik
Notizen:
The grown-in defects in gem quality crystals of natural apatite have been investigated using X-ray diffraction topography. The most common defects are the fault surfaces which are parallel to {10\overline 11} growth horizons, and these fault surfaces result from the incorporation of impurities during the growth of the crystal. The dislocation density of the crystals is low. A majority of these dislocations align with [0001] and have Burgers vector b = c[0001]. Some dislocations make about 15° with [0001] and have a Burgers vector with a c-axis component, probably b = \mida + c\mid〈12\overline 23 〉. A minority of the dislocations, nearly normal to the growth surfaces, have a mixed character with Burgers vector b = a〈11\overline 20〉.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1107/S0021889870005617
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