[
    {
        "short-name" {
            "source-value" [
                "bcc"
            ]
        } 
        "a" {
            "si-unit" "m" 
            "source-unit" "angstrom" 
            "si-value" 4.32297436893e-10 
            "source-value" 4.32297436893
        } 
        "temperature" {
            "si-unit" "K" 
            "source-unit" "K" 
            "si-value" 0.0 
            "source-value" 0
        } 
        "property-id" "tag:staff@noreply.openkim.org,2014-05-21:property/elastic-constants-isothermal-cubic-crystal-npt" 
        "c44" {
            "si-unit" "kg / m s^2" 
            "source-unit" "GPa" 
            "si-value" 5864499407.820001 
            "source-std-uncert-value" 0.0018339826812115905 
            "source-value" 5.864499407816264
        } 
        "space-group" {
            "source-value" "Im-3m"
        } 
        "excess" {
            "si-unit" "kg / m s^2" 
            "source-unit" "GPa" 
            "si-value" 30719014.8504 
            "source-std-uncert-value" 0.002593643180913312 
            "source-value" 0.030719014850380824
        } 
        "basis-atom-coordinates" {
            "source-value" [
                [
                    0.0 
                    0.0 
                    0.0
                ] 
                [
                    0.5 
                    0.5 
                    0.5
                ]
            ]
        } 
        "c12" {
            "si-unit" "kg / m s^2" 
            "source-unit" "GPa" 
            "si-value" 5803019659.84 
            "source-std-uncert-value" 0.005187286361833273 
            "source-value" 5.80301965983852
        } 
        "c11" {
            "si-unit" "kg / m s^2" 
            "source-unit" "GPa" 
            "si-value" 7416562758.679999 
            "source-std-uncert-value" 0.007335930724820233 
            "source-value" 7.4165627586754574
        } 
        "cauchy-stress" {
            "si-unit" "kg / m s^2" 
            "source-unit" "GPa" 
            "si-value" [
                0.0 
                0.0 
                0.0 
                0.0 
                0.0 
                0.0
            ] 
            "source-value" [
                0 
                0 
                0 
                0 
                0 
                0
            ]
        } 
        "species" {
            "source-value" [
                "Na" 
                "Na"
            ]
        } 
        "instance-id" 1
    } 
    {
        "short-name" {
            "source-value" [
                "bcc"
            ]
        } 
        "a" {
            "si-unit" "m" 
            "source-unit" "angstrom" 
            "si-value" 4.32297436893e-10 
            "source-value" 4.32297436893
        } 
        "temperature" {
            "si-unit" "K" 
            "source-unit" "K" 
            "si-value" 0.0 
            "source-value" 0
        } 
        "isothermal-bulk-modulus" {
            "si-unit" "kg / m s^2" 
            "source-unit" "GPa" 
            "si-value" 6340867359.45 
            "source-std-uncert-value" 0.004235401578730396 
            "source-value" 6.340867359450833
        } 
        "property-id" "tag:staff@noreply.openkim.org,2014-04-15:property/bulk-modulus-isothermal-cubic-crystal-npt" 
        "space-group" {
            "source-value" "Im-3m"
        } 
        "basis-atom-coordinates" {
            "source-value" [
                [
                    0.0 
                    0.0 
                    0.0
                ] 
                [
                    0.5 
                    0.5 
                    0.5
                ]
            ]
        } 
        "cauchy-stress" {
            "si-unit" "kg / m s^2" 
            "source-unit" "GPa" 
            "si-value" [
                0.0 
                0.0 
                0.0 
                0.0 
                0.0 
                0.0
            ] 
            "source-value" [
                0 
                0 
                0 
                0 
                0 
                0
            ]
        } 
        "species" {
            "source-value" [
                "Na" 
                "Na"
            ]
        } 
        "instance-id" 2
    }
]