{
    "property-id" "tag:staff@noreply.openkim.org,2014-04-15:property/configuration-cluster-relaxed" 
    "instance-id" 1 
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            "Si" 
            "Si" 
            "Si"
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            ] 
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    "unrelaxed-configuration-forces" {
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        "source-unit" "eV" 
        "si-unit" "kg m^2 / s^2" 
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    "relaxed-configuration-forces" {
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        "source-unit" "eV/angstrom" 
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        "si-value" [
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    "relaxed-potential-energy" {
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        "source-unit" "eV" 
        "si-unit" "kg m^2 / s^2" 
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}