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These minerals are mostly found in China, the United States, Brazil, India, Sri Lanka and Australia; China is by far the world leader in samarium mining and production.
Ekanite is an uncommon silicate mineral with chemical formula Ca 2 ThSi 8 O 20 or (Ca,Fe,Pb) 2 (Th,U)Si 8 O 20. It is a member of the steacyite group. It is among the few gemstones that are naturally radioactive. Most ekanite is mined in Sri Lanka, although deposits also occur in Russia and North America.
The chemical element samarium was first isolated from a specimen of samarskite in 1879. Samarium was named after samarskite which was named for the Russian mine official, Colonel Vasili Samarsky-Bykhovets (1803–1870). [4] Samarskite-(Yb) was first described in 2004 for an occurrence in the South Platte Pegmatite District, Jefferson County ...
Pages in category "Samarium minerals" The following 2 pages are in this category, out of 2 total. This list may not reflect recent changes. F. Florencite-(Sm) M.
Sri Lanka, geologically speaking is an extremely old country. Ninety percent of the rocks of the island are of Precambrian age, 560 million to 2,400 million years ago. The gems form in sedimentary residual gem deposits, eluvial deposits, metamorphic deposits, skarn and calcium-rich rocks. Nearly all the gem formations in Sri Lanka are located ...
Samarium minerals (2 P) S. Samarium(II) compounds (5 P) Samarium(III) compounds (21 P) Pages in category "Samarium compounds" The following 8 pages are in this ...
Neodymium is rarely dominant in these minerals, with exceptions such as monazite-(Nd) and kozoite-(Nd). [42] The main mining areas are in China, United States, Brazil, India, Sri Lanka, and Australia. The Nd 3+ ion is similar in size to ions of the early lanthanides of the cerium group (those from lanthanum to samarium and europium).
Lankem Ceylon PLC is a chemicals, paints and consumer goods manufacturing company in Sri Lanka. The company also engaged in the hospitality industry by owning and operating resorts in Sri Lanka. The company is incorporated in 1964 by Royal Dutch Shell and listed on the Colombo Stock Exchange in 1970.