{"version":"1.0","type":"link","title":"Simpsonite - Newikis","description":"Simpsonite has a general formula of Al4(Ta,Nb)3O13(OH). It occurs as euhedral to subhedral tabular to short and prismatic crystals, commonly in subparallel groups. Under the petrographic microscope it has a very high relief.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://upload.wikimedia.org/wikipedia/commons/2/26/Simpsonite-154999.jpg","thumbnail_width":800,"thumbnail_height":730}