{"product_id":"uranopyrochlore-macdonald-mine-hastings-county-ontario","title":"Uranopyrochlore — Macdonald Mine, Hastings County, Ontario","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePyrochlore group minerals occupy an important niche in the radioactive mineral world: complex niobate-tantalate oxides with a flexible structure that accommodates uranium, thorium, rare earth elements, and a range of other substitutions. Uranopyrochlore is the uranium-dominant member of the group, characterized by elevated U content at the A-site of the pyrochlore structure. Like other pyrochlore group minerals in uranium-bearing pegmatite systems, uranopyrochlore is frequently metamict — its crystal structure progressively disordered by sustained self-irradiation — and occurs as octahedral to modified cubic crystals, often with a dark brown to black colour and resinous to adamantine lustre.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Macdonald Mine in Hastings County is a Bancroft camp locality with a history of uranium and associated rare mineral production, situated in the same Grenvillian pegmatite belt responsible for the broader Bancroft uranium district. Uranopyrochlore from this locality is a genuine mineralogical specimen, not a common find: pyrochlore-group minerals are collected both for their own intrinsic interest and as representatives of the broader niobium-uranium mineral suite that characterizes this part of the Canadian Shield. This specimen is offered for advanced radioactive and rare mineral collections.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cem\u003eRadioactive. Canada domestic shipping only.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cem\u003eApprox. specimen size: 90mm x 65mm x 55mm\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cem\u003eApprox. specimen weight: 247.55 grams\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cem\u003eApprox. specimen activity on an SE International Ranger EXP: 46000 CPM\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e","brand":"Rad Man Minerals","offers":[{"title":"Default Title","offer_id":54104784142620,"sku":null,"price":100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/5524\/1500\/files\/P5100146.jpg?v=1778438054","url":"https:\/\/radmanminerals.com\/products\/uranopyrochlore-macdonald-mine-hastings-county-ontario","provider":"Rad Man Minerals","version":"1.0","type":"link"}