{"echo_id":"3f8fb0f0-7561-4897-835f-63e54083856c","kind":"person","canonical_name":"Martin Heinrich Klaproth","aliases":[],"summary":"Martin Heinrich Klaproth, 1743–1817. Chemist who isolated uranium and zirconium. Born 1 December 1743. Died 1 January 1817. This Echo is the name and span, not a biography.","years":"1743–1817","place_hint":null,"tags":["person","historical"],"verified":false,"public_publish":true,"primary_image_url":"https://media-vayati.s3.us-east-va.io.cloud.ovh.us/echoes/visages/3f8fb0f0-7561-4897-835f-63e54083856c/8c8ec211f44da9a5aabb.jpg","primary_image_type":"upload","is_placeholder":false,"image_is_placeholder":false,"created_at":"2026-10-17T06:18:46.707Z","updated_at":"2026-10-17T06:18:47.424Z","parent_place_echo_id":null,"place_grain":null,"nested_places":[],"parent_place":null}