A controlled indexing system for inorganic substances and material systems and is designed to overcome a number of problems which arise in searching for chemical substances in uncontrolled index terms.
Each chemical index term has a role indicator assigned to it to distinguish between the different references.
Some substances may be assigned one or more special roles which are of significance to solid-state physics and electronics. These are:
Each component of a substance is assigned one of these roles - e.g., the element silicon (Si) is indexed as Si/el and silicon dioxide is indexed as Si02/bin Si/bin 0/bin.
H2SO4 H2SO4/ss SO4/ss H2/ss O4/ss H/ss S/ss O/ss
P doped Si Si:P/bin Si/bin P/bin Si/el P/el P/dop
Cu-Al alloy CuAl/bin Cu/bin Al/bin
Si-Au interface Si-Au/int Si/int Au/int Si/el Au/el
GaAlAs GaAlAs/ss Ga/ss Al/ss As/ss
GaxAl1-xAs GaAlAs/ss Ga/ss Al/ss As/ss
Ga0.25Al0.75As Ga0.25Al0.75As/ss Ga0.25/ss Al0.75/ss Ga/ss Al/ss As/ss
For further information, see the documentation section.