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Kalkopüriit

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Kalkopüriit
Omadused
Keemiline valem CuFeS2
Mineraaliklass sulfiidid
Molekulmass 183.54
Värvus vaskkollane, võib ka olla lillakas-sinakas.
Kõvadus 3,5
Süngoonia tetragonaalne
Kriips rohekasmust
Läige metalne[1][2][3][4][5]

Kalkopüriit on mineraal, mis koosneb vasest, rauast ja väävlist (CuFeS2). Mohsi skaalal on ta kõvadus 3,5 kuni 4 ning värvuselt on ta vaske (või ka kulda) meenutavalt kollakas, vahel ka lillakas-sinakas. Kriips on rohekasmust.[4]

Õhuga kokkupuutel kalkopüriit oksüdeerub erinevateks oksiidideks, hüdroksiidideks, sulfaatideks jne. Kalkopüriidiga seotud ja sarnanevate mineraalide hulka kuuluvad sulfiidid borniit (Cu5FeS4), kalkotsiit (Cu2S), kovelliit (CuS), digeniit (Cu9S5); karbonaadid malahhiit ja asuriit; lisaks on veel sarnaseid oksiide, näiteks kupriit (Cu2O). Kalkopüriiti leidub harva koos loodusliku puhta vasega. Kalkopüriit on tähtis vasemaak.

  1. Klein, Cornelis and Cornelius S. Hurlbut, Jr., Manual of Mineralogy, Wiley, 20th ed., 1985, pp. 277 – 278 ISBN 0-471-80580-7
  2. Palache, C., H. Berman, and C. Frondel (1944) Dana’s system of mineralogy, (7th edition), v. I, 219–224
  3. http://www.mindat.org/min-955.html mindat.org
  4. 4,0 4,1 http://webmineral.com/data/Chalcopyrite.shtml Webmineral.com
  5. Handbook of Mineralogy
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Kalkopüriit
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