{
    "property-id" "tag:staff@noreply.openkim.org,2014-04-15:property/cohesive-potential-energy-hexagonal-crystal"
    "instance-id" 1
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    "species" {
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            "Nb"
            "Nb"
            "Nb"
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    "a" {
        "source-value" 9.18155214579
        "source-unit" "angstrom"
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    "c" {
        "source-value" 28.2805627
        "source-unit" "angstrom"
    }
    "cohesive-potential-energy" {
        "source-value" 8.477932903661971
        "source-unit" "eV"
    }
}