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Cleavage, in mineralogy and materials science, is the tendency of crystalline materials to split along definite crystallographic structural planes. These...

used in their identification. Fracture differs from cleavage in that the latter involves clean splitting along the cleavage planes of the mineral's crystal...

fractures when they lack a cleavage plane and do not break along a plane parallel to their crystalline faces. So, a conchoidal, or uneven, fracture is...

present in the rock. A common outdated term for disjunctive cleavage is fracture cleavage. It is recommended[according to whom?] that this term be avoided...

conditions for fracture are the most favorable at the boundary between this plastic and elastic zone, and thus cracks often initiate by the cleavage of a grain...

cases brittle fracture will continue even when loading is discontinued. In brittle crystalline materials, fracture can occur by cleavage as the result...

In embryology, cleavage is the division of cells in the early development of the embryo, following fertilization. The zygotes of many species undergo rapid...

for tibial plateau fracture: Type I = Lateral Tibial plateau fracture without depression. This is a wedge-shaped pure cleavage fracture and involves a vertical...

Pencil cleavage in geology refers to a cleavage in rock such that long, slender, pencil-shaped fragments of rock are created by fracturing during the...

igneous rock. The name is from the Ancient Greek for "straight fracture", because its two cleavage planes are at right angles to each other. It is a type of...

experience transgranular fracture. When examined under scanning electron microscopy, this type of fracture reveals cleavage steps, river patterns, feather...

as habit, hardness, lustre, diaphaneity, colour, streak, tenacity, cleavage, fracture, parting, specific gravity, magnetism, fluorescence, radioactivity...

break (fracture) of natural origin in a layer or body of rock that lacks visible or measurable movement parallel to the surface (plane) of the fracture ("Mode...

exceptionally rare crystal form. It has a perfect basal cleavage and an uneven flat fracture, and it is foliated with a two-dimensional platy form. The...

Greek πλάγιος (plágios) 'oblique', and κλάσις (klásis) 'fracture', in reference to its two cleavage angles. Plagioclase is the most common and abundant mineral...

the isometric-hexoctahedral class. It has very poor cleavage and is brittle to conchoidal fracture. It is quite soft, with a Mohs hardness of 1.5 to 2...

(c-axis). Also parallel to the principal axis is one direction of perfect cleavage. The mineral is between 6 and 7 on the Mohs hardness scale, and its specific...

(/ˈblæstəˌsiːl/), also spelled blastocoele and blastocele, and also called cleavage cavity, or segmentation cavity is a fluid-filled or yolk-filled cavity...

ways: a specific absorbed energy, change in aspect of fracture (such as 50% of the area is cleavage), etc. The qualitative results of the impact test can...

individual shiny surfaces,” lines of cleavage or fracture, naturally passing along the boundaries of the perfect cleavage of belomorite. This effect also appears...