Subgroup or transform index

Property name: Subgroup or transform index
Description: Subgroup or transform index.
Type: integer

For subgroup transforms it is the crystallographic subgroup index [G:H], equal to the determinant factor of the basis transformation when applicable.

{
    "$id": "https://schemas.anyterial.se/defs/v0.1/properties/transformations/index",
    "$schema": "https://schemas.optimade.org/meta/v1.3/optimade/property_definition.json",
    "title": "Subgroup or transform index",
    "x-optimade-type": "integer",
    "x-optimade-definition": {
        "kind": "property",
        "version": "0.1.0",
        "format": "1.3",
        "name": "index",
        "label": "index_transformations"
    },
    "type": [
        "integer",
        "null"
    ],
    "description": "Subgroup or transform index.\n\nFor subgroup transforms it is the crystallographic subgroup index `[G:H]`, equal to the determinant factor of the basis transformation when applicable.",
    "x-optimade-unit": "inapplicable",
    "examples": [
        2,
        4
    ]
}

Subgroup or transform index (property)