Qhov Tseem Ceeb Qhov txawv - Pyrite vs Chalcopyrite
Pyrite thiab chalcopyrite yog ob qho tib si sulfide minerals, tab sis lawv cov tshuaj muaj pes tsawg leeg sib txawv. Qhov sib txawv tseem ceeb ntawm pyrite thiab chalcopyrite yog pyrite muaj hlau sulfide (FeS2) whereas chalcopyrite muaj sulfides ntawm tooj liab thiab hlau (CuFeS2). Txawm hais tias muaj cov npe zoo sib xws thiab cov qauv tshuaj zoo sib xws, lawv cov khoom siv tshuaj sib txawv, thiab lawv tau siv rau hauv kev lag luam sib txawv.
YPyrite yog dab tsi?
Pyrite yog cov ntxhia sulfide uas muaj hlau (Fe) thiab sulfur (S) ua cov khoom tsim. Nws cov tshuaj formula yog FeS2 Nws tseem hu ua hlau pyrite thiab "fool's kub" vim nws cov xim daj daj daj. Nyob rau hauv ancient sij hawm, tib neeg to taub yuam kev pyrite li kub vim nws muaj ib tug yellowish metallic luster zoo li kub. Nws yog ib qho ntawm feem ntau pom sulfide minerals, thiab nws kuj tuaj yeem pom nrog lwm cov oxides hauv quartz leeg, pob zeb sedimentary, thiab cov pob zeb metamorphic. Qee zaum, nws pom nyob rau hauv me me ntawm kub ib yam nkaus. Lo lus "pyrite" yog los ntawm Greek lo lus "pyr", uas muaj lub ntsiab lus "hluav taws". Nws tau txais lub npe no txij li pyrite tuaj yeem tsim cov nplaim taws thaum nws tsoo lwm cov ntxhia lossis hlau.
Chalcopyrite yog dab tsi?
Chalcopyrite yog tooj liab sulfide ntxhia, thiab nws cov tshuaj formula yog CuFeS2 Cov pob zeb no yog ib txwm nthuav tawm hauv ntau yam ores; los ntawm cov loj loj mus rau cov hlab ntsha tsis xwm yeem thiab nws tau suav tias yog cov tooj liab tseem ceeb tshaj plaws. Chalcopyrite oxidizes rau ntau hom oxides, hydroxides, thiab sulfates thaum nws raug huab cua. Qee qhov piv txwv suav nrog bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), digenite (Cu9S5), malachite Cu2CO 3(OH)2, thiab tsis tshua muaj oxides xws li cuprite (Cu2O). Tab sis, nws tsis tshua pom muaj nrog cov tooj liab ib txwm muaj (Nws yog daim ntawv tsis sib xyaw ntawm tooj liab uas tshwm sim raws li cov ntxhia hauv ntuj).
Qhov txawv ntawm Pyrite thiab Chalcopyrite yog dab tsi?
Pom ntawm Pyrite thiab Chalcopyrite:
Pyrite: Nws muaj cov xim daj daj daj nrog cov xim hlau.
Chalcopyrite: Nws yog brassy rau golden yellowish hauv xim.
Tshuaj muaj pes tsawg leeg ntawm Pyrite thiab Chalcopyrite:
Pyrite: Pyrite muaj cov tshuaj FeS2, thiab nws yog hlau sulfide ntxhia.
Chalcopyrite: Cov tshuaj formula ntawm chalcopyrite yog CuFeS2. Nws yog tooj liab sulfide ntxhia uas muaj txiaj ntsig kev lag luam ntau dua vim nws yog cov tooj liab tseem ceeb tshaj plaws hauv ntiaj teb.
Tshaj Tawm ntawm Oxidization ntawm Pyrite thiab Chalcopyrite:
Pyrite: Feem ntau, cov nplua nuj crystallized pyrite yog qhov ruaj khov, thiab cov no yog tsim los ntawm sedimentary concentrations decomposes (Cov txheej txheem ntawm kev sib cais ntawm cov khoom mus rau hauv nws cov constituents los ntawm cov tshuaj tiv thaiv) sai sai. Pyrite oxidizes maj mam nyob rau hauv ib qho chaw noo noo thiab tso tawm sulfuric acid uas yog tsim thaum lub sij hawm txheej txheem.
Chalcopyrite: Nyob rau hauv qhov raug huab cua, chalcopyrite tsim tsis tsuas yog ib tug compound tab sis ob peb hom oxides, hydroxides, thiab sulfates. Piv txwv ntawm qee cov sulfates yog; bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), digenite (Cu9S5). Malachite Cu2CO3(OH)2 yog piv txwv rau hydroxide thiab cuprite (Cu2O) yog ib qho tsis tshua muaj oxide. Chalcopyrite tsis tshua muaj oxidizes rau haiv neeg tooj liab.
Kev Siv Pyrite thiab Chalcopyrite:
Pyrite: Pyrite yog siv los tsim sulfur dioxide rau cov txheej txheem tsim ntawv. Nws kuj tseem siv los tsim sulfuric acid los ntawm thermally decomposing pyrite (FeS2) rau hauv hlau (II) sulfide (FeS) thiab ces mus rau elemental sulfur ntawm 540 ° C; ntawm 1 atm.
Chalcopyrite: Hauv kev lag luam nplai, chalcopyrite feem ntau yog siv los ua tooj liab loj. Txawm tias nws tsuas muaj ib qho kev siv xwb; Nws suav hais tias yog qhov tseem ceeb heev vim tias cov xov tooj tooj liab tau siv nyob rau hauv yuav luag txhua yam khoom siv hluav taws xob hauv lub neej niaj hnub no.
