Interstitial: get started and input examples

Interstitial calculates the energy difference when adding an atom into the crystal structure. We need to give the information of supercell (default value is [1, 1, 1]) and insert_ele list for the element types of the atoms added in.

An example of the input file for Interstitial by deepmd:

{
	"structures":	"confs/mp-*",
	"interaction": {
		"type":		"deepmd",
                "model":        "frozen_model.pb",
		"type_map":	{"Al": 0, "Mg": 1}
	},
	"properties": [
            {
                "type":         "interstitial",
                "supercell":	[1, 1, 1],
                "insert_ele":   ["Al","Mg"]
	    }
        ]
}