Feldspar's fracture is brittle
The fracture of feldspar is conchoidal or brittle.
The fracture of feldspar is conchoidal or brittle.
In brittle fracture, no apparent plastic deformation takes place before fracture. In ductile fracture, extensive plastic deformation (necking) takes place before fracture.
The mineral cobaltite, CoAsS, has a brittle fracture, and exhibits good cleavage in three directions.
The fracture of magnetite is typically subconchoidal to uneven, with irregular or jagged edges. It can also exhibit a brittle fracture pattern.
Their breaking strength is smaller than their shear strength. Once the strain on the material surpasses the elastic limit, the material will fracture and in process known as brittle fracture. This plastic deformation is permanent and irreversible.
Boron is brittle, as it tends to fracture easily under stress without significant plastic deformation.
Gypsum has a brittle fracture with a conchoidal or uneven break. It tends to break into irregular, sharp pieces when fractured.
For the uraninite: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments; data from http://webmineral.com/data/Uraninite.shtml. Any mineral of uranium has its specific properties - and we know now approx. 200 uranium minerals.
Yes, the Earth's crust is brittle. This means that it can fracture or break easily under stress or pressure, leading to the formation of faults, earthquakes, and other geological activities.
Some brittle materials are cast iron, concrete, high carbon steels, ceramics and glass. A brittle material is easily shattered and has little resistance against fracture.