American Heritage® Dictionary of the English Language, Fourth Edition
- n. A velvet-black mineral that is a complex mixture of several rare-earth metals with niobium and tantalum oxide.
Century Dictionary and Cyclopedia
- n. A niobate of uranium, iron, and manganese, of a velvet-black color, submetallic luster, and conchoidal fracture. It is found in the Ilmen mountains, also in considerable quantity in North Carolina. It has yielded a number of new elements, belonging especially to the yttrium group (decipium, philippium, etc.), whose properties are not as yet wholly determined.
- n. mineralogy A shiny black radioactive mineral that contains a complex mixture of rare earth oxides
GNU Webster's 1913
- adj. (Min.) A rare mineral having a velvet-black color and submetallic luster. It is a niobate of uranium, iron, and the yttrium and cerium metals.
- n. a complex black mineral occurring in pegmatites
- After Vasilii Evgrafovich Samarski-Bykhovets in 1847. (Wiktionary)
- After Col. M. von Samarski, 19th-century Russian mining official. (American Heritage® Dictionary of the English Language, Fourth Edition)
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List of minerals, elements, group names and geochemistry terms encountered in the science of mineralogy. I've chosen to avoid capital letters in most examples, though a great many mineral names hon...
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