{
    "property-id" "tag:staff@noreply.openkim.org,2014-04-15:property/structure-rhombohedral-crystal-npt"
    "instance-id" 1
    "space-group" {
        "source-value" "R-3m"
    }
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    "species" {
        "source-value" [
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    }
    "cauchy-stress" {
        "source-value" [
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        ]
        "source-unit" "GPa"
    }
    "temperature" {
        "source-value" 0
        "source-unit" "K"
    }
    "a" {
        "source-value" 5.07491669
        "source-unit" "angstrom"
    }
    "alpha" {
        "source-value" 90
        "source-unit" "degree"
    }
}