Transport and C-13 nuclear magnetic resonance studies on potassium-ammoniaintercalated graphite

Authors
Reghai, L Conard, J Fuzellier, H Lelaurain, M McRae, E
Citation
L. Reghai et al., Transport and C-13 nuclear magnetic resonance studies on potassium-ammoniaintercalated graphite, J PHYS CH S, 62(11), 2001, pp. 2083-2090
Citations number
66
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN journal
00223697 → ACNP
Volume
62
Issue
11
Year of publication
2001
Pages
2083 - 2090
Database
ISI
SICI code
0022-3697(200111)62:11<2083:TACNMR>2.0.ZU;2-U
Abstract
We have synthesized and studied two new second stage graphite intercalation compounds of the K-NH3 family. The beta ' variety KC8(NH3)(0.55 +/-0.05) p ossesses an interplanar distance d(i) of 820 pm, while the T-2 species, KC2 4(NH3)(1.4 +/-0.1) has d(i) = 645 pm. The latter compound with the smaller interplanar distance is shown to be a better in-plane conductor and to unde rgo a strong c-axis resistivity transition centered around 150 K, which NMR results suggest as being due to blocking of rotation of the NH3 molecules. (C) 2001 Elsevier Science Ltd. All rights reserved.