Qhov sib txawv tseem ceeb ntawm quartz thiab feldspar yog cov tshuaj tseem ceeb tam sim no hauv quartz yog silicon whereas, hauv feldspar, nws yog aluminium.
Quartz thiab Feldspar yog cov zaub mov uas peb tuaj yeem pom muaj txiaj ntsig hauv lub ntiaj teb pob zeb. Ntau tshaj 60% ntawm lub ntiaj teb crust muaj Feldspars. Feldspar cov ntaub ntawv thaum magma solidifies rau hauv cov pob zeb tsis muaj zog. Ntawm qhov tod tes, quartz yog ib qho oxide ntawm silicon uas muaj ntau nyob rau hauv lub ntiaj teb crust. Qee yam ntawm quartz yog "semiprecious gemstones". Vim lawv cov qauv zoo sib xws, ntau tus neeg tseem tsis meej pem ntawm ob daim ntawv ntxhia no. Yog li ntawd, tsab xov xwm no sim qhia txog qhov sib txawv ntawm quartz thiab feldspar, uas yog ob qho tseem ceeb tshaj plaws pob zeb tsim cov zaub mov.
Quartz yog dab tsi?
Quartz yog cov ntxhia hauv cov ntxhia uas muaj silicon thiab oxygen atoms. Nws muaj silicon dioxide (SiO2) molecules. Tsis tas li ntawd, nws yog cov ntxhia tshaj plaws nyob rau hauv lub ntiaj teb crust. Txawm hais tias nws muaj SiO2, qhov rov ua dua ntawm cov pob zeb no yog SiO4. Nws yog vim hais tias, nyob rau hauv cov qauv tshuaj ntawm quartz, nws muaj ib tug silicon atom bonded rau plaub oxygen atoms nyob ib ncig ntawm nws. Yog li ntawd, lub geometry nyob ib ncig ntawm silicon atom yog tetrahedral. Txawm li cas los xij, ntawm ob lub qauv tetrahedral, ib qho oxygen atom sib koom. Yog li ntawd, cov txheej txheem siv lead ua ntawm cov ntxhia yog hexagonal.
Daim duab 01: Quartz Appearance
Tsis tas li ntawd, quartz siv lead ua yog chiral. Qhov ntawd txhais tau tias; Lub quartz muaj nyob rau hauv ob daim ntawv raws li ib txwm α-quartz thiab high-temperature β-quartz. Daim ntawv alpha tuaj yeem hloov mus rau hauv daim ntawv beta ntawm ib ncig ntawm 573 ° C. Saib ntawm lawv qhov tshwm sim, qee hom quartz tsis muaj xim thiab pob tshab thaum lwm cov ntaub ntawv muaj yeeb yuj thiab translucent. Cov xim ntau tshaj plaws ntawm cov pob zeb no yog dawb, grey, ntshav thiab daj.
Feldspar yog dab tsi?
Feldspar yog cov ntxhia pob zeb uas muaj cov txhuas, silicon thiab oxygen atoms. Nws muaj alumina thiab silica units ua ke nrog ib leeg. Peb tuaj yeem categorize nws raws li cov ntxhia silicate vim, xws li hauv quartz, nws muaj SiO2 units. Feldspars tsim thaum magma solidifies rau hauv cov pob zeb tsis muaj zog. Txawm li cas los xij, nws kuj tshwm sim hauv ntau cov pob zeb metamorphic thiab sedimentary. Ntxiv mus, peb tuaj yeem muab cov tshuaj formula ntawm cov pob zeb no li KAlSi 3O8 - NaAlSi3O 8 – CaAl2Si2O8 Nws yog qhov rov ua dua ntawm cov pob zeb no.
Daim duab 02: Lub Teeb Xim Feldspar Sample
Cov ntxhia streak ntawm feldspar yog dawb, thiab cov siv lead ua feem ntau yog cov qauv triclinic thiab monoclinic. Nws muaj nyob rau hauv cov xim sib txawv xws li liab, dawb, grey thiab xim av. Ntxiv mus, lub luster ntawm cov ntxhia no yog vitreous. Raws li muaj pes tsawg leeg, muaj peb hom minerals li poov tshuaj feldspar, albite los yog sodium feldspar thiab anorthite los yog calcium feldspar. Tsis tas li ntawd, cov ntxhia huab cua ntawm cov khoom no tsim cov av nplaum xws li kaolinite.
Qhov txawv ntawm Quartz thiab Feldspar yog dab tsi?
Quartz yog cov ntxhia hauv cov khoom siv uas muaj silicon thiab oxygen atoms, thiab feldspar yog cov ntxhia hauv cov ntxhia uas muaj cov txhuas, silicon, thiab oxygen atoms. Yog li, qhov sib txawv tseem ceeb ntawm quartz thiab feldspar yog cov tshuaj tseem ceeb tam sim no hauv quartz yog silicon whereas hauv feldspar nws yog txhuas. Raws li lwm qhov sib txawv tseem ceeb ntawm quartz thiab feldspar peb tuaj yeem hais tias chav tsev rov ua dua ntawm quartz yog SiO4 thaum lub tsev rov ua dua ntawm feldspar yog KAlSi3O 8 – NaAlSi3O8 – CaAl2Si 2O8
Tsis tas li ntawd, quartz nyuaj dua li feldspar. Tsis tas li ntawd, peb tuaj yeem txheeb xyuas qhov sib txawv ntawm quartz thiab feldspar los ntawm cov xim. Qhov ntawd yog; quartz feem ntau tshwm nyob rau hauv lub teeb xim whereas feldspar tuaj yeem pom nyob rau hauv ntau yam xim, txawm tias tsaus xim zoo li xim av thiab ntshav vim muaj impurities. Ntau qhov sib txawv tau pom hauv cov duab hauv qab no ntawm qhov sib txawv ntawm quartz thiab feldspar.
Summary – Quartz vs Feldspar
Quartz thiab feldspar yog pob zeb tsim cov zaub mov. Ob leeg no muaj silicon thiab oxygen atoms. Txawm li cas los, lawv cov compositions yog txawv los ntawm txhua lwm yam. Yog li, qhov sib txawv tseem ceeb ntawm quartz thiab feldspar yog cov tshuaj tseem ceeb tam sim no hauv quartz yog silicon whereas hauv feldspar nws yog txhuas.
