1. Crystal Chemistry of Hydrogen in Intermetallic Compounds
Earle Ryba

2. Crystal Chemistry of Hydrogen in Intermetallic Compounds
Need way to store and transport hydrogen in
future ‘hydrogen society’

3. Crystal Chemistry of Hydrogen in Intermetallic Compounds
Need way to store and transport hydrogen in
future ‘hydrogen society’
As gas? – very hi press.

4. Crystal Chemistry of Hydrogen in Intermetallic Compounds
Need way to store and transport hydrogen in
future ‘hydrogen society’
As gas? – very hi press.
As liq.? – very low temp.

5. Crystal Chemistry of Hydrogen in Intermetallic Compounds
Need way to store and transport hydrogen in
future ‘hydrogen society’
As gas? – very hi press.
As liq.? – very low temp.
As solid? – is this possible?

6. Many intermetallic compounds absorb significant quantities of H2
Storage of 4 kg H2

7. For example – LaNi5 & LaNi5H7 structures –
from neutron diffraction studies Ni La
possible H sites

8. Crystal Chemistry of Hydrogen in Intermetallic Compounds
H atom jumps in LaNi5

9. Crystal Chemistry of Hydrogen in Intermetallic Compounds
H atom sites in TaV2

10. What needs to be done?
For known hydrogen storage intermetallic compounds
& their hydrides:

11. What needs to be done?
For known hydrogen storage intermetallic compounds
& their hydrides:
calculate bond distances & angles, hydrogen
interstice sizes, CN #s, possible (hybrid) bond
orbitals

12. What needs to be done?
For known hydrogen storage intermetallic compounds
& their hydrides:
calculate bond distances & angles, hydrogen
interstice sizes, CN #s, possible (hybrid) bond
orbitals
2. investigate effects of atom type to which H is
bonded, alloy substitution, thermal motion

13. What needs to be done?
For known hydrogen storage intermetallic compounds
& their hydrides:
calculate bond distances & angles, hydrogen
interstice sizes, CN #s, possible (hybrid) bond
orbitals
2. investigate effects of atom type to which H is
bonded, alloy non-stoichiometry, thermal motion
3. look for correlations, trends, directions for possible
new hydrogen storage materials, hydrides for future
detailed structure studies

14. Crystal Chemistry of Hydrogen in Intermetallic Compounds
To download ppt and/or word files on
H storage & Ti-Ru-Al alloy development,
see: