Assertion: Cinnabar (HgS) yog ib qho piv txwv ntawm rhombohedral crystal system.
Rhombohedral system yog dab tsi?
: a siv lead ua ke uas muaj peb qhov sib npaug thiab sib pauv hloov tau ntawm cov kaum sib npaug rau ib leeg thiab feem ntau yog cais raws li kev faib ntawm hexagonal system - piv tetragonal system.
piv txwv ntawm orthorhombic siv lead ua yog dab tsi?
Alpha-sulphur, cementite, olivine, aragonite, orthoenstatite, topaz, staurolite, barite, cerussite, marcasite, thiab enargite
crystallize hauv orthorhombic system. Crystals nyob rau hauv ib qho orthorhombic system yog tus cwj pwm los ntawm peb qhov kev sib nrig sib txuas uas tsis sib npaug ntawm qhov ntev.
7 hom siv lead ua yog dab tsi?
Cov pab pawg no tau raug xa mus rau lub kaw lus trigonal siv lead ua. Tag nrho muaj xya lub tshuab siv lead ua: triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, thiab cubic. Ib tsev neeg siv lead ua yog txiav txim los ntawm lattices thiab point pawg.
Qhov twg yog qhov piv txwv zoo tshaj plaws ntawm cubic crystal system?
Raws li, cov qauv qub qub, nrog rau qhov tshwj xeeb qis atomic packing factor, yog qhov tsawg, tab sis pom muaj nyob hauv polonium. Cov bcc thiab fcc, nrog lawv cov ntom ntom, yog ob qho tib si hauv qhov xwm txheej. Piv txwv ntawm bcc suav nrog hlau, chromium, tungsten, thiab niobium
