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Difference between revisions of "Borrmann effect"

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= Borrmann effect =
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<font color="blue">Effet Borrmann</font> (''Fr''). <font color="red">Borrmann Effekt</font> (''Ge''). <font color="black">Effetto Borrmann</font> (''It''). <font color="purple">ボルマン効果</font> (''Ja''). <font color="brown">Бормана эффект</font> (''Ru''). <font color="green">Efecto Borrmann</font> (''Sp'').
 
 
 
 
=== Other languages ===
 
 
 
Effet Borrmann (''Fr''). Borrmann Effekt (''Ge''). Efecto Borrmann (''Sp'').
 
 
 
  
 
== Definition ==
 
== Definition ==
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== Super-Borrmann effect ==
 
== Super-Borrmann effect ==
  
It is the enhancement of the Borrmann effect in a three-beam case, ''e.g.'' when the 111 and -111 reflections are simultaneously excited in a silicon or germanium crystal.  
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It is the enhancement of the Borrmann effect in a three-beam case, ''e.g.'' when the <math>111 </math>  and <math>{\bar 1}11 </math> reflections are simultaneously excited in a silicon or germanium crystal.  
 
== History ==
 
== History ==
  
The Borrmann effect was first discovered in quartz (Borrmann G., 1941, ''Über Extinktionsdiagramme der Röntgenstrahlen von Quarz''. ''Physik Z.'', '''42''', 157-162) and then in calcite crystals (Borrmann G., 1950, ''Die Absorption von Röntgenstrahlen in Fall der Interferenz. '' ''Z. Phys.'', '''127''', 297-323), and interpreted by [http://journals.iucr.org/10.1107/S0365110X49000242 Laue] (Laue, M. von, 1949, ''Die Absorption der  Röntgenstrahlen in Kristallen im Interferenzfall.'' ''Acta Crystallogr''. '''2''', 106-113).
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The Borrmann effect was first discovered in quartz [Borrmann, G. (1941). ''Physik Z.'', '''42''', 157-162. ''Über Extinktionsdiagramme der Röntgenstrahlen von Quarz''] and then in calcite crystals [Borrmann, G. (1950). ''Z. Phys.'' '''127''', 297-323. ''Die Absorption von Röntgenstrahlen in Fall der Interferenz''], and interpreted by [https://doi.org/10.1107/S0365110X49000242 Laue] [Laue, M. von (1949). ''Acta Cryst.'' '''2''', 106-113. ''Die Absorption der Röntgenstrahlen in Kristallen im Interferenzfall''] .
 
 
The super-Borrmann effect was first observed by Borrmann G. and Hartwig W. (1965), ''Die Absorption der Röntgenstrahlen im Dreistrahlfall der Interferenz''. ''Z. Krist.'', '''121''', 401-409.
 
  
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The super-Borrmann effect was first observed by Borrmann, G. and Hartwig, W. [(1965). ''Z. Krist.'' '''121''', 401-409. ''Die Absorption der Röntgenstrahlen im Dreistrahlfall der Interferenz''].
  
 
=== See also ===
 
=== See also ===
  
Section 5.1 of ''International Tables of Crystallography, Volume B'' for X-rays
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*Chapter 5.1 of ''International Tables for Crystallography, Volume B'' for X-rays
 
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*Chapter 5.2 of ''International Tables for Crystallography, Volume B'' for electrons
Section 5.2 of ''International Tables of Crystallography, Volume B'' for electrons
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*Chapter 5.3 of ''International Tables for Crystallography, Volume B'' for neutrons
 
 
Section 5.3 of ''International Tables of Crystallography, Volume B'' for neutrons
 
  
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[[Category:X-rays]]
[[Category:X-rays]]<br>
 

Latest revision as of 05:24, 20 December 2018

Effet Borrmann (Fr). Borrmann Effekt (Ge). Effetto Borrmann (It). ボルマン効果 (Ja). Бормана эффект (Ru). Efecto Borrmann (Sp).

Definition

Due to anomalous absorption, type 1 wavefields propagate in a perfect or nearly perfect crystal with a less than normal absorption. For details and the physical interpretation, see anomalous absorption.

Super-Borrmann effect

It is the enhancement of the Borrmann effect in a three-beam case, e.g. when the [math]111 [/math] and [math]{\bar 1}11 [/math] reflections are simultaneously excited in a silicon or germanium crystal.

History

The Borrmann effect was first discovered in quartz [Borrmann, G. (1941). Physik Z., 42, 157-162. Über Extinktionsdiagramme der Röntgenstrahlen von Quarz] and then in calcite crystals [Borrmann, G. (1950). Z. Phys. 127, 297-323. Die Absorption von Röntgenstrahlen in Fall der Interferenz], and interpreted by Laue [Laue, M. von (1949). Acta Cryst. 2, 106-113. Die Absorption der Röntgenstrahlen in Kristallen im Interferenzfall] .

The super-Borrmann effect was first observed by Borrmann, G. and Hartwig, W. [(1965). Z. Krist. 121, 401-409. Die Absorption der Röntgenstrahlen im Dreistrahlfall der Interferenz].

See also

  • Chapter 5.1 of International Tables for Crystallography, Volume B for X-rays
  • Chapter 5.2 of International Tables for Crystallography, Volume B for electrons
  • Chapter 5.3 of International Tables for Crystallography, Volume B for neutrons