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Difference between revisions of "Right-handed quartz"

From Online Dictionary of Crystallography

(Created page with "==Definition== The dextrorotatory quartz is called right-handed quartz. The space group of the right-handed quartz in the low-temperature phase is ''P''3<sub>2</sub>21. ...")
 
 
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<font color="blue">Quartz droit</font> (''Fr''). <font color="black">Quarzo destrogiro</font> (''It''). <font color="purple">右石英</font> (''Ja''). <font color="green">Cuarzo diestro</font> (''Sp'').
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==Definition==
 
==Definition==
 
The dextrorotatory quartz is called [[right-handed quartz]].  The space group of the [[right-handed quartz]] in the low-temperature phase is ''P''3<sub>2</sub>21.
 
The dextrorotatory quartz is called [[right-handed quartz]].  The space group of the [[right-handed quartz]] in the low-temperature phase is ''P''3<sub>2</sub>21.
  
 
==History==
 
==History==
In 1811, D. F. J. Arago found the optical activity of the quartz plate prepared by cutting the crystal into slices perpendicular to the [c] axis.  In 1819, J.-B. Biot examined the quartz plates by a polarimeter to recognize that there are dextrorotatory and laevorotatory quartz.  The absolute structure of the dextrorotatory quartz was determined by X-ray anomalous scattering in 1958 by A. De Vries to establish the relationship that the dextrorotatory quartz has 3<sub>2</sub> screw axes.  
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In 1811, D. F. J. Arago found the optical activity of the quartz plate prepared by cutting the crystal into slices perpendicular to the ''c'' axis.  In 1819, J.-B. Biot examined the quartz plates by a polarimeter to recognize that there are dextrorotatory and laevorotatory quartz.  The absolute structure of the dextrorotatory quartz was determined by X-ray anomalous scattering in 1958 by A. De Vries to establish the relationship that the dextrorotatory quartz has 3<sub>2</sub> screw axes.  
  
 
==Reference==
 
==Reference==

Latest revision as of 13:01, 26 March 2019

Quartz droit (Fr). Quarzo destrogiro (It). 右石英 (Ja). Cuarzo diestro (Sp).


Definition

The dextrorotatory quartz is called right-handed quartz. The space group of the right-handed quartz in the low-temperature phase is P3221.

History

In 1811, D. F. J. Arago found the optical activity of the quartz plate prepared by cutting the crystal into slices perpendicular to the c axis. In 1819, J.-B. Biot examined the quartz plates by a polarimeter to recognize that there are dextrorotatory and laevorotatory quartz. The absolute structure of the dextrorotatory quartz was determined by X-ray anomalous scattering in 1958 by A. De Vries to establish the relationship that the dextrorotatory quartz has 32 screw axes.

Reference

  • Glazer, A. M. (2018). J. Appl. Cryst. 51, 915–918. Confusion over the description of the quartz structure yet again

See also