Versatile in situ powder X-ray diffraction cells for solid-gas investigations.
J Appl Crystallogr
; 43(Pt 6): 1456-1463, 2010 Dec 01.
Article
in En
| MEDLINE
| ID: mdl-22477780
ABSTRACT
This paper describes new sample cells and techniques for in situ powder X-ray diffraction specifically designed for gas absorption studies up to ca 300â
bar (1â
bar = 100â
000â
Pa) gas pressure. The cells are for multipurpose use, in particular the study of solid-gas reactions in dosing or flow mode, but can also handle samples involved in solid-liquid-gas studies. The sample can be loaded into a single-crystal sapphire (Al(2)O(3)) capillary, or a quartz (SiO(2)) capillary closed at one end. The advantages of a sapphire single-crystal cell with regard to rapid pressure cycling are discussed, and burst pressures are calculated and measured to be â¼300â
bar. An alternative and simpler cell based on a thin-walled silicate or quartz glass capillary, connected to a gas source via a VCR fitting, enables studies up to â¼100â
bar. Advantages of the two cell types are compared and their applications are illustrated by case studies.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Appl Crystallogr
Year:
2010
Document type:
Article