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Difference between revisions of "Borrmann effect"

From Online Dictionary of Crystallography

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== History ==
 
== 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, ''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
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*Chapter 5.3 of ''International Tables for Crystallography, Volume B'' for neutrons
  
Section 5.2 of ''International Tables of Crystallography, Volume B'' for electrons
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[[Category:X-rays]]
 
 
Section 5.3 of ''International Tables of Crystallography, Volume B'' for neutrons
 
 
 
[[Category:X-rays]]<br>
 

Revision as of 15:16, 12 May 2017

Effet Borrmann (Fr). Borrmann Effekt (Ge). Efecto Borrmann (Sp). Effetto Borrmann (It)

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