Structural relationships in rare earth-transition metal hydrides
Abstract
Several structural types of form AB/sub 2/, AB/sub 3/, A/sub 2/B/sub 7/, and AB/sub 5/ (A = rare earth, B = transition metal) are known to be closely related, with local environments which are very similar among the different compounds. Based on these relationships, we suggest that hydride phases A/sub l/B/sub m/H/sub n/ should be related according to the relationships n(AB/sub 3/) = 1/3n(AB/sub 5/) + 2/3n(AB/sub 2/) and n(A/sub 2/B/sub 7/) = n(AB/sub 5/) + n(AB/sub 2/) where the n(AB/sub m/) are observed hydrogen phase concentrations. It is shown that the phases observed in pressure-composition isotherms for AB/sub 3/ and A/sub 2/B/sub 7/ systems can be understood from this viewpoint. A discussion is given of the maximum hydrogen concentration possible in the compounds having these structure types.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 6588678
- Report Number(s):
- CONF-800402-20
Journal ID: ISSN 0022-5088
- DOE Contract Number:
- W-31-109-ENG-38
- Resource Type:
- Conference
- Resource Relation:
- Journal Volume: 74; Journal Issue: 1; Conference: International symposium on the properties and applications of metal hydrides, Colorado Springs, CO, USA, 7 Apr 1980
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; HYDRIDES; PHASE STUDIES; RARE EARTH COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; HYDROGEN COMPOUNDS; 360102* - Metals & Alloys- Structure & Phase Studies
Citation Formats
Dunlap, B. D., Viccaro, P. J., and Shenoy, G. K. Structural relationships in rare earth-transition metal hydrides. United States: N. p., 1980.
Web. doi:10.1016/0022-5088(80)90075-2.
Dunlap, B. D., Viccaro, P. J., & Shenoy, G. K. Structural relationships in rare earth-transition metal hydrides. United States. https://doi.org/10.1016/0022-5088(80)90075-2
Dunlap, B. D., Viccaro, P. J., and Shenoy, G. K. 1980.
"Structural relationships in rare earth-transition metal hydrides". United States. https://doi.org/10.1016/0022-5088(80)90075-2. https://www.osti.gov/servlets/purl/6588678.
@article{osti_6588678,
title = {Structural relationships in rare earth-transition metal hydrides},
author = {Dunlap, B. D. and Viccaro, P. J. and Shenoy, G. K.},
abstractNote = {Several structural types of form AB/sub 2/, AB/sub 3/, A/sub 2/B/sub 7/, and AB/sub 5/ (A = rare earth, B = transition metal) are known to be closely related, with local environments which are very similar among the different compounds. Based on these relationships, we suggest that hydride phases A/sub l/B/sub m/H/sub n/ should be related according to the relationships n(AB/sub 3/) = 1/3n(AB/sub 5/) + 2/3n(AB/sub 2/) and n(A/sub 2/B/sub 7/) = n(AB/sub 5/) + n(AB/sub 2/) where the n(AB/sub m/) are observed hydrogen phase concentrations. It is shown that the phases observed in pressure-composition isotherms for AB/sub 3/ and A/sub 2/B/sub 7/ systems can be understood from this viewpoint. A discussion is given of the maximum hydrogen concentration possible in the compounds having these structure types.},
doi = {10.1016/0022-5088(80)90075-2},
url = {https://www.osti.gov/biblio/6588678},
journal = {},
issn = {0022-5088},
number = 1,
volume = 74,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1980},
month = {Tue Jan 01 00:00:00 EST 1980}
}