X-Ray Powder Diffraction XRPD XRD. E = h c / λ E = 12.398 / λ λ = 12.398 / V E in (keV) and λ in (Ǻ) 1 (nm) = 10 (Ǻ) X-Ray is an Electromagnetic radiation.

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Presentation transcript:

X-Ray Powder Diffraction XRPD XRD

E = h c / λ E = / λ λ = / V E in (keV) and λ in (Ǻ) 1 (nm) = 10 (Ǻ) X-Ray is an Electromagnetic radiation

λ = 2 d sin θ,Bragg Law X-Rays Diffraction أشعة سينية متوازية تسقط على مستويات بلورية متوازية تفصل بينها مسافة-d ألمعرفة كيفية وجود هذه المستويات البلورية ، لابد من التعرف على تركيب العينة التي في الحالة الصلبة

Sample : Powders Lose Powders Bound Powders: Metal The best Grain size : (1 – 10) μm or Crystallite size : (1000 – 10000) nm

The Chemical Unit of Mn(H 2 O) 6. (ClO 4 ) 2

The Unit Cell of Mn(H 2 O) 6. (ClO 4 ) 2

The Crystal Structure of Mn(H 2 O) 6. (ClO 4 ) 2 Regular arrangement Lattice planes

The Unit Cell of NaCl

Debye-Scherrer Camera Debye-Scherrer Film

X-Ray Diffractometer

XRPD of MgCr 2 O 4, Cr 2 O 3, MgO and Mixed of the three

Crystalline and Non-Crystalline (Amorphous) SiO 2

XRPD‘s of the SiO 2 phases (polymorphs)

ICDD card

Example from the Hanawalt Search Manual ©ICDD©ICDD Used with permission from the International Centre for Diffraction Data. Back © Copyright © Copyright Birkbeck College, University of London.Birkbeck College, University of London.