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Minerals known as "fool's gold"
Answer for the clue "Minerals known as "fool's gold" ", 7 letters:
pyrites
Alternative clues for the word pyrites
Word definitions for pyrites in dictionaries
Wiktionary
Word definitions in Wiktionary
n. (plural of pyrite English)
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Pyrites \Py*ri"tes\, n. [L., fr. Gr. ?, fr. ? fire. See Pyre .] (Min.) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color. Note: The term was originally applied to the mineral ...
Usage examples of pyrites.
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.
For example: 3 grams of an ore containing a good deal of pyrites and a little galena, gave, when fused with litharge, 16.
It towered over Cracia, the largest and oldest city on Pyrites, a three thousand metre ironwork tower, raised four hundred years before, partly to honour the Emperor but mostly to celebrate the engineering skill of the Pyriteans.
It seemed there was no one else on Pyrites close enough or trusted enough to do it.
First I knew was Pyrites, when you volunteered me as custodian for the damn crystal.
He teased himself with memories of Pyrites, where the stabbing wet-cold of the outer city reaches had seemed so painful.
The weighed portion of ore should be placed in a clean crucible and be heated to incipient redness: with pyrites the first effect is to drive off about half the sulphur as vapour which burns as flame over the ore.
Iron pyrites generally carries copper and is frequently associated with the above-mentioned minerals.
Iron is found combined with sulphur in pyrrhotine and pyrites, and together with arsenic in mispickel.
The mispickel and copper and iron pyrites are converted into oxides by roasting, and are in great part removed by a subsequent washing.
For example, this occurs in the case of a mixture of pyrites with oxide of iron, or in a mixture of sulphides and sulphates.
Free or native sulphur may be volatilised, condensed, and weighed, but pyrites only gives up a portion of its sulphur when heated in a closed vessel, while most sulphides, and all sulphates, give up none at all.
How would blende compare with pyrites as a source of sulphur for sulphuric acid making?
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.
Then came a blank stretch, ending in a wall that they had scratched to find nothing more than iron pyrites, that glittered nobly, but showed their true nature under close inspection.