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Перевод: arsenical
[прилагательное] содержащий мышьяк; мышьяковый
Тезаурус:
- Other diuretics have been known for a long time, especially arsenical compounds of mercury.
- Arsenical copper use was therefore very shortlived in Britain, compared with Egypt.
- Arsenical copper could never have been easy to make or work with; during smelting, clouds of poisonous arsenious oxide are produced and in re-melting the alloy some of the arsenic may be lost.
- The advent of copper began much later, in the middle of the third millennium BC; whilst arsenical copper was used, it was replaced by tin bronze at a much earlier date.
- In fact, the tools turn out to be either simply copper or arsenical copper (none are made of bronze), whereas weapons are never made of copper alone and most are tin bronze.
- During the third millennium BC most axes were made of unalloyed copper and few were of arsenical copper, but by the middle of the third millennium arsenical copper gradually supplanted copper and this, in turn, was replaced by tin bronze and also some leaded tin bronze.
- A typical study of ancient Egyptian tools and weapons, particularly axes, shows that four copper-based metals or alloys were used from the early third millennium BC to the middle of the first millennium BC: "pure" copper; arsenical copper (an alloy of copper with up to h per cent of arsenic); tin bronze or leaded tin bronze; and iron.
- Tin bronze had almost completely superseded arsenical copper by the end of the second millennium BC although the scale of this change varied considerably throughout the Old World.
- The few weapons that are made of arsenical copper contain more arsenic than the tools, thus making them potentially harder.
- As with arsenical copper, there were difficulties in the manufacture of brass, because zinc metal is also highly reactive and volatile and was not isolated in quantity until the fifteenth century AD in India.
- Initially the manufacture of arsenical copper was accidental.
- Much early copper contains a small percentage of arsenic and this, arsenical copper, was the first alloy to be put to practical use throughout the ancient world.
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