{"id":"S85034488","label":"Crystal optics","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85034488","normalized_label":"crystal optics","broader":["http://id.loc.gov/authorities/subjects/sh85034498","http://id.loc.gov/authorities/subjects/sh85095187"],"aliases":["Crystals--Optical properties","Optical crystallography"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85034488","provider":"lcsh","revision":"d3a57005a4f1a3c6","taxonomy_revision":"f050b5d4780b1289","title":"Crystal optics","url":"/topics/S85034488","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10124096635253687876","address_version":"morton4x16-v1","coordinates":[0,20,17943,57344],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}