Ultra-high vacuum heating camera for<i>in situ</i>synchrotron radiation X-ray topographic studies

Gastaldi, J.; Jourdan, C.; Marzo, P.; Allasia, C.; Jullien, J. N.

doi:10.1107/s0021889882012230

Cited by 27 publications

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“…By use of the UHV (ultra high vacuum) system designed by Gastaldi, Jourdan, Marzo, Allasia & Jullien (1982) for in situ synchrotron-radiation X-ray topography, associated with a TV camera and a video recording system (Sauvage & Petroff, 1980), it is now possible to follow directly the ~-fl transition and the 0tl-~2 twinning in quartz samples. For preliminary investigations, a Z-cut plate of l0 x l0 x 1 mm was cut from a synthetic bar (Zarka, Liu Lin & Buisson, 1981) in a zone where lattice defects like dislocations and growth bands were present.…”

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Observations on the phase transition in quartz by synchrotron-radiation X-ray topography

Zarka¹

1983

J Appl Cryst

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By use of a high-temperature camera designed for in situ synchrotron-radiation X-ray topography the ~-fl transition was investigated in a Z-cut synthetic-quartz sample. Preliminary dynamical observations on movement of the boundaries between ~ and fl phases and ~t 1 and ~2 domains are reported.Quartz undergoes a phase transition at about 846 K. The low-temperature phase has symmetry 32 and the hightemperature fl phase presents symmetry 622 (Frondel, 1945). In the Dauphin6 twin the part ~ is rotated by 180 ° about the c axis with respect to 0~ 2. Different phases (~t-fl)and twinned regions (~1-~2) satisfy simultaneously the Bragg condition for all lattice planes. However, there are differences in atomic positions in the unit cell, so that the respective structure factors differ for some reflections (Young, 1962). For example, the structure factors F30:~ 1 = 25

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confidence: 99%

Observations on the phase transition in quartz by synchrotron-radiation X-ray topography

Zarka¹

1983

J Appl Cryst

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“…High-temperature X-ray topographic studies were undertaken using the UHV (ultra-high vacuum) system designed by Gastaldi, Jourdan, Marzo, Allasia & Jullien (1982) for in situ synchrotron-radiation X-ray topography. This furnace, associated with a TV camera and a video recording system (Sauvage & Petroff, 1980), permits one to follow the ~-fl transition directly.…”

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confidence: 99%

Observation of defects and the incommensurate phase in berlinite crystals by high-temperature X-ray topography

Zarka¹,

Capelle²,

Philippot³

et al. 1986

J Appl Cryst

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Growth defects and the incommensurate phase have been observed in synthetic berlinite (AlPO4) samples. This study was performed by high‐temperature X‐ray topography using synchrotron radiation at LURE (Orsay, France). Some results concerning the defects observed above room temperature are presented. The incommensurate phase was investigated by using a narrow beam which allows the observation and analysis of the satellites around Bragg spots.

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“…Both the ultra-high vacuum (UHV) heating camera and the white-beam synchrotron topographic technique have been described in a previous paper [13]. Only a brief description will therefore be given in this paper.…”

Section: I Apparut Usmentioning

confidence: 99%

Synchrotron X-ray topography study of stresses appearing to crystal boundaries during the aluminium recrystallization process

Jourdan¹,

Gastaldi²

1986

phys. stat. sol. (a)

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During the aluminium recrystallization process, the growth of small recrystallized crystals wholly included in the matrix is followed by synchrotron topography. Their polyhedral shape is disclosed by the various pendellösung fringe networks. From experimental observations we have been able to show that the fringe spacing variations observed are sometimes due to stresses appearing sporadically at the boundaries of the small crystals.

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Ultra-high vacuum heating camera forin situsynchrotron radiation X-ray topographic studies

Cited by 27 publications

References 0 publications

Observations on the phase transition in quartz by synchrotron-radiation X-ray topography

Observations on the phase transition in quartz by synchrotron-radiation X-ray topography

Observation of defects and the incommensurate phase in berlinite crystals by high-temperature X-ray topography

Synchrotron X-ray topography study of stresses appearing to crystal boundaries during the aluminium recrystallization process

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