Cleavage/Fracture: Biotite muaj ib qho zoo meej, uas pab tsim nws cov ntawv nyias (5). Crystal Form: Daim ntawv siv lead ua yog monoclinic, txhais tau tias nws muaj peb qhov tsis sib xws uas tsim ib lub duab plaub.
Muaj pes tsawg lub dav hlau cleavage puas biotite?
softer dua iav; FOUR cleavage dav hlau!
Puas biotite puas muaj kev sib cais?
Mica (piv txwv li biotite, chlorite lossis muscovite) muaj ib lub dav hlau tawg, feldspar (xws li orthoclase lossis plagioclase) muaj ob qhov sib tshuam ntawm 90 °, thiab amphibole (xws li hornblende) muaj ob qho uas tsis sib tshuam ntawm 90 °. Calcite muaj peb lub dav hlau cleavage uas tsis sib tshuam ntawm 90 °.
Puas biotite muaj cubic cleavage?
Properties of Biotite
It is a black mica with perfect cleavage and a vitreous luster on the cleavage faces. Thaum biotite tau muab cais ua cov ntawv nyias, cov nplooj ntawv hloov tau yooj yim tab sis yuav tawg thaum khoov hnyav. Thaum tuav mus txog lub teeb, cov nplooj ntawv yog pob tshab rau translucent nrog xim av, grey, lossis xim ntsuab.
Muaj pes tsawg cleavage dav hlau muaj calcite?
Peb zoo meej cleavages muab calcite nws rau-sided polyhedrons nrog pob zeb diamond-puab ntsej muag; Lub kaum sab xis txhais lub ntsej muag yog 78 ° thiab 102 °. Peb yam tseem ceeb siv lead ua (cov duab txawv ntawm cov ntxhia) ntawm calcite yog: (1) prismatic (ob leeg luv thiab ntev), (2) rhombohedral, thiab (3) scalenohedral.
