page_title: Thorite
hierarchical_section_title: Thorite
caption_attribution_description: English: Thorite Locality: Kemp prospect (Kemp property; Kemp uranium mine), Cardiff Township, Haliburton County, Ontario, Canada (Locality at mindat.org) Size: 2.2 x 2.2 x 1.6 cm. A sharp, euhedral, pristine, rust-brown thorite crystal from the less well-known Kemp Uranium Mine in Cheddar, Ontario, Canada. This floater is remarkable for the size. It dates to the 1950s. Good thorite specimens are nearly impossible to obtain today, and specimens from Cheddar rank among the best ever found. Ex. George Elling Collection. Deutsch: Thorit Fundort: Kemp prospect (Kemp property; Kemp uranium mine), Cardiff Township, Haliburton County, Ontario, Kanada (Fundort bei mindat.org) Größe: 2.2 x 2.2 x 1.6 cm.
context_page_description: Thorite, SiO₄, is a rare nesosilicate of thorium that crystallizes in the tetragonal system and is isomorphous with zircon and hafnon. It is the most common mineral of thorium and is nearly always strongly radioactive. It was named in 1829 to reflect its thorium content. Thorite was discovered in 1828 on the island of Løvøya, Norway, by the vicar and mineralogist, Hans Morten Thrane Esmark, who sent the first specimens of this black mineral to his father, Jens Esmark, who was a professor of mineralogy and geology.
context_section_description: Thorite, (Th,U)SiO₄, is a rare nesosilicate of thorium that crystallizes in the tetragonal system and is isomorphous with zircon and hafnon. It is the most common mineral of thorium and is nearly always strongly radioactive. It was named in 1829 to reflect its thorium content. Thorite was discovered in 1828 on the island of Løvøya, Norway, by the vicar and mineralogist, Hans Morten Thrane Esmark, who sent the first specimens of this black mineral to his father, Jens Esmark, who was a professor of mineralogy and geology.
caption: Thorite crystal from the Kemp uranium mine in Ontario (size: 2.2 x 2.2 x 1.6 cm)
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