Table salt is sodium chloride. Its crystals are cubical.
halides
Yes. Triclinic crystals are usually flat with sharp edges though they don't have right angles. ex. feldspar
It means that the chemical bonds of the mineral aren't too strong along the lines and that when you break the mineral it'll break along those lines. please go to www.freewebs.com/mccniu (minerals aren't on it)
A diamond shines in so many directions because light from the sun or any other light source which shines on the diamond is reflected and refracted back to the eye of the beholder, based on its facets and the innate reflective property of diamond mineral.
I believe the answer would be the crystal system, but the crystal system is based on the angles and length of the axis of the crystal. The axis length and the angle at which they meet would affact the number and angle of the crystal faces.
halides
Rock salt.
Two directions of cleavage, at 90 degrees to each other.
Plagioclase feldspar is a non-metallic mineral. It has 2 cleavages at nearly right angles. It is also differentiated from potassium feldspar because it contains striations. Potassium feldspar has 2 cleavages at nearly right angles.
They attacked by land and by sea from all sorts of angles and directions.
sorry i do not know
Any polygon can contain acute interior angles.
Its structure is Trigonal bipyramidal, 3 chlorine are arranged in a plane around the phosphorus having the angles of 120o and 2 chlorine are attached at above and below the triangular plane having the angles of 90o
A direction. To be unique it must be at right angles to your other directions.
No, but it contains 2 obtuse angles and 2 acute angles
Classifications by side length or comparison of angles and sides:scalene - no sides or angles equalisosceles - two sides and angles equal (congruent)equilateral - all sides and angles equal (all 60° angles)Classifications by included angles :right triangle - contains a 90° angle (right angle)oblique triangle - has no right angleacute triangle - contains all angles less than 90°obtuse triangle - contains one angle greater than 90°
Classifications by side length or comparison of angles and sides:scalene - no sides or angles equalisosceles - two sides and angles equal (congruent)equilateral - all sides and angles equal (all 60° angles)Classifications by included angles :right triangle - contains a 90° angle (right angle)oblique triangle - has no right angleacute triangle - contains all angles less than 90°obtuse triangle - contains one angle greater than 90°