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New X-ray powder diffraction data for thallium pentaborates Tl[B5O6(OH)4]·2H2O and TlB5O8

Published online by Cambridge University Press:  10 January 2013

M. Touboul ,
N. Penin  and
L. Seguin
M. Touboul*
Affiliation:
Laboratoire de Réactivité et de Chimie des Solides, UPRES-A 6007, Université de Picardie Jules Verne, 33, rue Saint-Leu, 80039 Amiens Cedex, France
N. Penin
Affiliation:
Laboratoire de Réactivité et de Chimie des Solides, UPRES-A 6007, Université de Picardie Jules Verne, 33, rue Saint-Leu, 80039 Amiens Cedex, France
L. Seguin
Affiliation:
Laboratoire de Réactivité et de Chimie des Solides, UPRES-A 6007, Université de Picardie Jules Verne, 33, rue Saint-Leu, 80039 Amiens Cedex, France
*
a)Author to whom all correspondence should be addressed; electronic mail: [email protected]
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Abstract

Precise X-ray powder diffraction patterns of hydrated and anhydrous thallium pentaborates have been collected on a D5000 diffractometer with a primary monochromated beam (λ Cu Kα1=1.5406 Å). Refinement of indexed reflections led to the following unit cell parameters: a=11.279(1)Å, b=7.1507(6)Å, c=13.953(1)Å, β=94.164(7)° in the P21/c space group with Z=4, Dx=2.713 gcm−3, Dm=2.6 gcm−3 for Tl[B5O6(OH)4]·2H2O and a=7.5698(5)Å, b=11.9509(6)Å, c=14.759(1)Å in the Pbca space group with Z=8, Dx=3.844 gcm−3, Dm=3.6 gcm−3 for TlB5O8. Very good Smith and Snyder figures of merit have been obtained: F30=139.7 (0.0043, 50) for Tl[B5O6(OH)4]·2H2O and F30=139.3 (0.0054, 40) for TlB5O8.

Keywords

thallium pentaboratethallium borateborate
Type
Research Article
Information
Powder Diffraction , Volume 14 , Issue 3 , September 1999 , pp. 237 - 239
Copyright
Copyright © Cambridge University Press 1999

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