| 单词 | copper pyrites |
| 例句 | Beat with a stone on copper pyrites, and it immediately begins to crumble. Harper's New Monthly Magazine Vol. IV, No. 19, Dec 1851 2011-12-25T03:00:11.297Z In the first are found veins of calcite and quartz from half-an-inch to three inches thick, in which especially in the calcite the gold is visible mixed with iron and copper pyrites, galena and blende. The Inhabitants of the Philippines 2011-11-23T03:00:21.653Z Magnetic pyrites, copper pyrites, zinc blende and arsenical pyrites are other and less important examples, the last constituting the gold ore formerly worked in Silesia. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z The substance used for the purpose was copper pyrites, which was changed to an impure sulphate of copper by the action of oil of vitriol and moist air. Catholic Churchmen in Science If it contains more than 55% of copper it is directly refined, while if it contains a lower percentage it is smelted with matte or calcined copper pyrites. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" If the quartz has much iron or copper pyrites, the sluice is used to collect this material and save it for separation at some future time. Hittel on Gold Mines and Mining This ore is often found mixed with iron or copper pyrites, and sometimes with blende. The Inhabitants of the Philippines 2011-11-23T03:00:21.653Z Some of you will have heard that there are smelting works to-day where the sulphurous acid, which copper pyrites supplies when it is roasted, is used for the manufacture of sulphuric acid. Aladdin of London or, Lodestar Black above, the Mimic Geotrupes is the colour of copper pyrites below; also black in all parts exposed to the light of day, the Stercoraceous Geotrupes displays a ventral surface of a glorious amethyst violet. The Glow-Worm and Other Beetles Calcination is only advisable for ores which contain relatively much iron pyrites and little copper pyrites. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Thallium is a rare metal, found in small quantities in some varieties of iron and copper pyrites, and in some lithia micas. A Text-book of Assaying: For the Use of Those Connected with Mines. But the same thing has been found in the feathers of certain birds whose color is metallic green, and it has been proven that such birds pick up and swallow shining bits of copper pyrites. In Search of the Unknown Copper.—Sometimes, as in the neighbourhood of copper mines or of some copper pyrites deposits, a water may be contaminated with small quantities of copper. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association It has the refulgency of copper pyrites, of gold, of Florentine bronze. The Glow-Worm and Other Beetles A hard, heavy, ductile metal, found native, and in many ores; of these the most important is copper pyrites, which is a sulphuret of copper. A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery. With a Short Explanation of Some of the Principal Natural Phenomena. For the Use of Schools and Families. Enlarged and Revised Edition. One gram of copper pyrites, blende, fahlerz, or mispickel, yields 7 or 8 grams of lead, whilst 1 gram of antimonite will give 6, and 1 gram of galena only a little over 3 grams. A Text-book of Assaying: For the Use of Those Connected with Mines. The floor of the cavern was covered with heaps of water-worn fragments of quartzose rock, containing copper pyrites, in some of which the cavities were covered by a deposit of greenish calcedony. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 1 Among them were specimens of copper pyrites in quartz, sulphate of strontian, foliated gypsum, and numerous calcareous petrifactions. Personal Memoirs of a Residence of Thirty Years with the Indian Tribes on the American Frontiers But since about 1860 sulphuric acid has been more largely made from iron or copper pyrites. The Project Gutenberg Encyclopedia Volume 1 of 28 The copper pyrites are roasted, dissolved in dilute sulphuric acid, and the liquid thus obtained is submitted to electrolysis. Scientific American Supplement, No. 433, April 19, 1884 This is because I have assumed in the calculations that the grains of copper pyrites, for example, were all copper pyrites and the particles of gangue were free from copper. A Text-book of Assaying: For the Use of Those Connected with Mines. The form of the copper pyrites is shown in Fig. Scientific American Supplement, No. 344, August 5, 1882 Some copper pyrites appear among these veins accompanied, it is said, by silvery-grey copper. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 The floor of the cavern was covered with heaps of water-worn fragments of quartzoze rock containing copper pyrites, in some of which the cavities were covered by a deposit of greenish calcedony. The History of Australian Exploration from 1788 to 1888 Simon was too distracted to heed, and Alan went hastily up to the rooms, where he found some copper pyrites in process of oxidation, giving forth volumes of strangling sulphur smoke. Masters of the Guild Chili, copper pyrites with gold in. —, walls cracked by earthquake in. The Student's Elements of Geology The most abundant compound of Cu is chalcopyrite, or copper pyrites, CuFeS2. An Introduction to Chemical Science It is also an important circumstance that near the point of contact, both the granite and the secondary rocks become metalliferous, and contain nests and small veins of blende, galena, iron, and copper pyrites. The Student's Elements of Geology In one case, where the fissure is partially filled up with silica inclosing iron and copper pyrites, gold has also been found in the vein-stone. The Student's Elements of Geology |
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