Brittle
When minerals do not display cleavage, they are said to have a fracture. Fracture describes the way a mineral breaks when it does not have cleavage planes. This can result in irregular or random patterns of breakage.
A mineral that splits evenly along flat surfaces is said to have a cleavage fracture. Cleavage occurs when a mineral breaks along weak atomic planes due to the internal atomic structure and bonding of the mineral.
This may be due to the overburden load, which is essentially the weight of all the material above the layer of minerals in question squashing them flat. Or it may be due to deformation caused by the movements of tectonic plates which often causes a form of deformation known as shearing where two things slide past each other. When this occurs in ductile rock masses, it acts to flatten and rotate mineral grains so that their long axis is parallel to the shear plane.
The parallel alignment of platy grains in a rock is called foliation. Foliation is commonly seen in metamorphic rocks where minerals align in a preferred orientation due to pressure and temperature changes during deformation.
A mineral that breaks into smooth pieces when a tool such as a hammer is used is said to have cleavage. Cleavage is the way a mineral breaks along planes of weakness in its crystal structure, resulting in smooth, flat surfaces. The number and orientation of these cleavage planes are specific to each mineral and can help in identifying the mineral.
Brittle
If a material can be permanently deformed without breaking, it is said to be ductile. Ductility refers to a material's ability to undergo significant plastic deformation before rupture, allowing it to stretch or shape into wires or other forms. Common examples of ductile materials include metals like copper and aluminum.
A material is considered ductile if it can be stretched or deformed without breaking. Ductility is the ability of a material to exhibit plastic deformation under tensile stress before fracture occurs. Materials like metals, such as gold and copper, are known for their ductile properties.
Silence
boom
There is nothing you can do. It takes two people to have a relationship and if one doesn't want one or can't there is no relationship.
what is your option in buying a used car and suddenly the dealer called you and they said they can not get the rate they have told you?
Suddenly Susan - 1996 Was It Something I Said 1-10 was released on: USA: 12 December 1996
cold turkey
you could get a tummy ache.
bohr said this
Two forces are said to be equivalent when they produce the same effect on an object, such as acceleration or deformation. This means that the forces have the same magnitude, direction, and line of action.