| 单词 | limonite |
| 例句 | The person did not specify how much the smelter is buying but said the purchases are of low-grade limonite ore. Indonesian nickel smelters turn to Philippines for ore as local supply tightens 2023-08-30T04:00:00Z Some important hydroxides are limonite and bauxite, which are ores of iron and aluminium respectively. Physical Geology 2015-01-01T00:00:00Z The Jie Shun’s manifest listed its only cargo as limonite, a kind of iron ore. Egyptian government documents: Officials in Cairo tried to cover up arms deal with North Korea 2019-10-25T04:00:00Z At first, the cargo hold appeared to match the description on the manifest: 2,300 tons of loose yellow rocks called limonite, a kind of iron ore. A North Korean ship was seized off Egypt with a huge cache of weapons destined for a surprising buyer 2017-10-01T04:00:00Z Granite temper and limonite pigment examination,by Professor Charles Meyer 13 Appendix IV. Mohave Pottery 2012-04-26T02:00:09.420Z The green sand when weathered is brown or rusty coloured, the glauconite being oxidized to limonite. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z The results of this process are illustrated in Figure 5.10, which shows a granitic rock in which some of the biotite and amphibole have been altered to form the iron oxide mineral limonite. Physical Geology 2015-01-01T00:00:00Z Customs officials who searched the ship in 2016 first saw only piles of yellow limonite stones in the ship’s cargo hold. Egyptian government documents: Officials in Cairo tried to cover up arms deal with North Korea 2019-10-25T04:00:00Z G�thite occurs with other iron oxides, especially limonite and hematite, and when found in sufficient quantity is mined with these as an ore of iron. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Both ferrous carbonate and limonite, however, occur in irregular surface deposits. North America 2011-05-05T02:00:20.027Z Magnetite or magnetic iron ore, specular iron, and limonite are also oxides of iron. Geology 2011-02-20T03:00:12.660Z Figure 5.10 A granitic rock containing biotite and amphibole which have been altered near to the rock’s surface to limonite, which is a mixture of iron oxide minerals. Physical Geology 2015-01-01T00:00:00Z Other iron oxides, like haematite and limonite, may be present as alteration-products of the magnetite. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z He found traces of lead, zinc and molybdenum, which are signs of copper enrichment, but not the form of a yellowish stone called limonite that he was seeking. Legendary U.S. Copper Prospector Has China as Biggest Customer 2010-11-04T23:08:00Z In the Ardennes clays bearing pyrites and oolitic limonite are about 30 ft. thick. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" Usually they are covered with a dark brown crust of limonite produced by weathering; occasionally imperfect crystalline faces may bound them. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7 "Columbus" to "Condottiere" They are principally finely divided quartz, epidote, zoisite, rutile, limonite, calcite, pyrites, and very small particles of these are rarely absent from natural clays. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" In thin sections it is translucent and optically isotropic, and recent examinations seem to prove that it is a homogeneous mineral and not a mechanical mixture of chrysocolla and limonite. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" The ore is a mixture of clay iron ore and Iron. spathic ore, together with limonite and hematite. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" The weathering of limestones containing minor percentages of iron minerals originally deposited with the limestones may result in the residual concentration of bodies of limonite or "brown ores" associated with clays near the surface. The Economic Aspect of Geology Sandstone of various colours was the chief material employed by the Khmers; limonite was also used. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Determine the percentage of iron in a sample of limonite from the following data: Sample = 0.5000 gram. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes This may be derived from any iron compound naturally present in the stone, especially from limonite by dehydration on baking. The Project Gutenberg Encyclopedia Volume 1 of 28 Ferric salts are a brownish red, as shown in hematite and limonite, and in some bottles. An Introduction to Chemical Science The iron sulphide commonly present in these ore bodies is oxidized to limonite at the surface, with the result that prospectors look for iron-stained rocks. The Economic Aspect of Geology |
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