| 单词 | haematite |
| 例句 | The authors used a thin, flat sample of single-crystal haematite, α-Fe2O3 — an electrical insulator that is the most common antiferromagnetic iron oxide. Spins travel far in an antiferromagnet 2018-09-11T04:00:00Z They argue that the haematite structures are similar to those produced by iron-oxidising bacteria today, as well as to microfossils found in younger rocks, hundreds of millions – rather than billions – of years old. Do the Quebec fossils prove that life begin much earlier than we thought? 2017-03-03T05:00:00Z Westall said it remains possible that the haematite structures were formed as a result of the high temperatures and pressures experienced by metamorphic rocks. World's oldest fossils found in Canada, say scientists 2017-03-01T05:00:00Z The scientists' putative microbes from Quebec are one-tenth the width of a human hair and contain significant quantities of haematite - a form of iron oxide or "rust". Life on Earth began 'earlier than thought' - BBC News 2017-03-01T05:00:00Z The paintings contain haematite and goethite from Keos, in the Aegean Sea, and red lead from Rio Tinto, in southern Spain. Light, relief 2016-02-18T05:00:00Z The paintings were made with the natural mineral pigment ochre – probably ironstone haematite – which the hunter-gatherers ground to a powder and mixed with water or other liquids to create paint. Cave paintings in Indonesia suggest art came out of Africa 2014-10-08T04:00:00Z Some of the filaments resemble loose coils, some are branched, and others appear to be joined to knobs of haematite. Do the Quebec fossils prove that life begin much earlier than we thought? 2017-03-03T05:00:00Z Researchers from Switzerland, the US and Israel identified what they termed "champion nanoparticles" of haematite, which are a few billionths of a metre in size. Rust promises hydrogen power boost 2013-07-08T17:27:23Z But just five years later the mine is springing back to life as a co-operative of artists turn the surviving stocks of haematite into high-quality artists' paint. Paint it red: artists find new life in west Cumbria's disused iron ore mine 2013-05-22T13:39:27Z Regular intergrowths of crystals of totally different substances such as staurolite with cyanite, rutile with haematite, blende with chalcopyrite, calcite with sodium nitrate, are not uncommon. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Micaceous iron ore consists of delicate steel-grey scales of specular haematite, unctuous to the touch, used as a lubricant and also as a pigment. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z The finer specimens of the Aegean gems are engraved with the wheel and the point in hard stones, such as chalcedony, amethyst, sard, rock-crystal and haematite. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z 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 The deposits are superficial, resulting from the opening out of veins at the surface, and consist chiefly of haematite. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The asset is estimated to hold 4.4 million tonnes of copper, 6 million ounces of gold and 225 million pounds of uranium, as well as haematite iron ore and rare earths, the document said. UPDATE 1-RMG, Teck court Chinese in Australian deposit sale 2010-04-08T07:25:00Z When crystallized, however, haematite often presents a dark colour, even iron-black; but on scratching the surface, the powder of the streak shows the colour of dried blood. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z The green colour is due to a chloritic mineral; the red to haematite. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" Red chalk or reddle is an impure earthy variety of haematite. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Anthracite, probably of inorganic origin, has been mined without permanent success in the Silurian beds near Kilnaleck, and is traceable freely, associated with veins of quartz and haematite, at Ballyjamesduff a little farther east. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Differs from A. constricta by longer thinner stem, and striate pileus. haematites, B. and Br. European Fungus Flora: Agaricaceae The hardness of the crystallized haematite is about 6, and the specific gravity 5.2. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z Considerable veins of haematite of good quality occur both in the Red Sea hills and in Sinai. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" Iron in lodes, as brown haematite, has been worked near Lostwithiel and elsewhere. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 4 "Coquelin" to "Costume" The surface of the stone had been covered with a fine layer of plaster, reddened with haematite, of which some traces remained; the skirt was painted white. El Kab For beauty of crystals and variety of forms the haematite mines of the Cleator Moor district in west Cumberland and the Furness district in north Lancashire are unsurpassed. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Very thin laminae of haematite, blood-red by transmitted light, occur as microscopic enclosures in certain minerals, such as carnallite and sun-stone, to which they impart colour and lustre. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z In the earlier part of the prehistoric age there was a soft brown ware with haematite facing, highly burnished. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" The ridges are generally hardened sandstone, marked with madrepores, and masses of brown haematite. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 The commonest beads were spherical and barrel-shaped, of carnelian, haematite, and amethyst, and discs of shell, these last the commonest of all. El Kab The steep banks beyond the river consisted of clay-slate having under it a conglomerate containing fragments of quartz cemented by compact haematite. Three Expeditions into the Interior of Eastern Australia, Volume 2 Much haematite occurs in a compact or massive form, often mammillary, and presenting on fracture a fibrous structure. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z The essential colouring materials are, for blue, copper; green, copper and iron; purple, cobalt; red, haematite; white, tin. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" Some fragments of titaniferous iron ore, with haematite changed by heat, and magnetic, lay in the gully, which had worn itself a channel on the north side of the village. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 Silicified fossil wood of a coniferous tree, is found abundantly in the plains, and in rounded pebbles in the banks and bed of the river, also chalcedony and compact brown haematite. Three Expeditions into the Interior of Eastern Australia, Volume 1 There is also a large rock of haematite under Mount Jellula. Three Expeditions into the Interior of Eastern Australia, Volume 2 The hard haematite is occasionally cut and polished as an ornamental stone, and certain kinds have been made into beads simulating black pearls. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z This ancient worship of stones, these benign virtues attributed to jade and haematite, belong to the savages of America as well as to the inhabitants of the forests of Thrace. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The elevated plains among these mountain masses show great patches of ferruginous conglomerate, which, when broken, look like yellow haematite with madrepore holes in it: this has made the soil of a red colour. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 Diamond, sir, in extraordinary evidence! in conjunction with specular iron ore, commonly called the red haematite, and the ferrous carbonate, or spathic iron. The Lord of the Sea We found on other parts of this open ground large blocks composed of irregular concretions of ironstone, covered with a thin coating of compact brown haematite. Three Expeditions into the Interior of Eastern Australia, Volume 2 Some worn pebbles of haematite, in particular, can only have come from their nearest parent rock, at a period when the valleys immediately adjoining the caves were much shallower than they now are. The Antiquity of Man Great masses of iron haematite cropped up above the surfaces in these forests. How I Found Livingstone; travels, adventures, and discoveres in Central Africa, including an account of four months' residence with Dr. Livingstone, by Henry M. Stanley Yellow haematite is very abundant, but the other rocks scarcely appear in the distance; we have mountains both on the east and west. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 The weapons and implements found included haematite and diorite projectiles used in slings, stone hatchets, and hammers pierced to receive handles, flint saws and obsidian knives. Manners and Monuments of Prehistoric Peoples We now come to large masses of haematite, which is often ferruginous: there is conglomerate too, many quartz pebbles being intermixed. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 Grey granite or quartz with talc in it or gneiss lie under the haematite. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 |
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