请教各位大神
在文献中看到“We placed a water molecule at neighboring 5c-Ti (fivefoldcoordination Ti atom, similarly hereinafter) for molecular adsorption model, and placed an H atom and an OH group at neighboring2c-O and 5c-Ti sites for dissociative adsorption model.”
想知道 5c-Ti和2c-O 是什么意思,谢谢!!!