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Ýíàðãèò
— ìèíåðàë ðîìáè÷åñêîé ñèñòåìû. Õèìè÷åñêèé ñîñòàâ — AsS 4 Cu. Âñòðå÷àåòñÿ áîëüøåé ÷àñòüþ â ñïëîøíûõ ìàññàõ; òâåðä. 3, óäåëüíûé âåñ — 4,36—4,47. Öâåò æåëåçíî-÷åðíûé.  çíà÷èòåëüíûõ êîëè÷åñòâàõ, êàê ìåäíàÿ ðóäà, âñòðå÷àåòñÿ â Ïåðó, Àðãåíòèíå.
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