Tridymite cov ntaub ntawv nyias hexagonal daim hlau uas feem ntau twinned, feem ntau nyob rau hauv pab pawg ntawm peb; nws lub npe alludes rau tus cwj pwm no. Nws feem ntau tshwm sim hauv cov pob zeb uas tsis muaj zog, ntau dua li cristobalite, xws li hauv trachytes ntawm Rhineland-Palatinate, lub teb chaws Yelemees; sab qaum teb Ltalis; thiab hauv Massif Central, Fabkis
Stishovite pom nyob qhov twg?
Cov txiaj ntsig tau zoo siab tshwj xeeb vim tias stishovite yog cov ntxhia muaj nyob hauv shocked pob zeb ntawm Barringer Crater thiab cov chaw zoo sib xws thoob plaws ntiaj teb Tseeb, stishovite (lub npe tom qab Lavxias teb sab siab- Tus kws tshawb fawb txog lub cev siab) tau pom thawj zaug ntawm Barringer Crater hauv xyoo 1962.
YPuas yog tridymite ib quartz?
Tridymite yog ib qho tsis tshua muaj polymorph ntawm cov ntxhia Quartz. Txawm li cas los xij, nws cov crystals yog qhov txawv heev thiab tsim cov cwj pwm txawv ntawm Quartz.
Dab tsi kub hloov pauv beta quartz rau tridymite?
Thaum kub ntawm 800-900 ° C, nws yog quartz thiab thaum qhov kub thiab txias yog nce mus rau 1000 ° Cnws yuav hloov mus rau tridymite thiab critobalite.
Puas quartz nthuav thaum cua sov?
Kev ntsuas qhov ntim qhov nthuav dav thaum cua sov pom txog 37% ntim nthuav dav (saib daim duab 4). Muaj ntau qhov sib txawv ntawm qhov sib txawv quartz qhov chaw. Lub ntim nthuav dav pib rau feem ntau cov qauv nyob ib ncig ntawm 1500 ° C thiab mus txog nws qhov siab tshaj plaws nyob ib ncig ntawm 1800 ° C.
