- niobium ore
- ниобиевая руда, ниобийсодержащие руда
English-Russian mining dictionary. В.П. Манышев.
niobium ore
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niobium processing — Introduction preparation of the ore for use in various products. Niobium (Nb) has a body centred cubic (bcc) crystal structure and a melting point of 2,468° C (4,474° F). Of the refractory metals, it has the lowest density and best… … Universalium
Ore resources on Mars — Mars may contain valuable ores that will be very useful to future colonists.[1] The abundance of volcanic features together with widespread cratering are strong evidence for a variety of ores. [2] Contents 1 How deposits are made 2 … Wikipedia
Ore genesis — The various theories of ore genesis explain how the various types of mineral deposits form within the Earth s crust. Ore genesis theories are very dependent on the mineral or commodity. Ore genesis theories generally involve three components:… … Wikipedia
niobium — /nuy oh bee euhm/, n. Chem. a steel gray metallic element resembling tantalum in its chemical properties; becomes a superconductor below 9 K; used chiefly in alloy steels. Symbol: Nb; at. no.: 41; at. wt.: 92.906; sp. gr.: 8.4 at 20°C. [1835 45;… … Universalium
Ore — For other uses, see Ore (disambiguation). Iron ore (Banded iron formation) … Wikipedia
mineral deposit — Introduction aggregate of a mineral in an unusually high concentration. About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… … Universalium
Pyrochlore — Infobox mineral name = Pyrochlore category = Oxide mineral boxwidth = boxbgcolor = caption = formula = (Na,Ca)2Nb2O6(OH,F) molweight = color = Brown, yellow brown, reddish brown, orange, black habit = disseminated granular subhedral system =… … Wikipedia
Djalma Guimarães — Born November 5, 1894(1894 11 05) Santa Luzia, Minas Gerais, Brazil Died October 10, 1973 … Wikipedia
Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… … Universalium
Iamgold — Corporation Type Public (TSX: IMG, NYSE: IAG, BSE … Wikipedia
Molybdenum — niobium ← molybdenum → technetium Cr ↑ Mo ↓ W … Wikipedia
