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A-ca-oo-mah-ca-ye - A-ca-oo-mah-ca-ye, also known as Feathers or Old Swan (d. 1859 or 1860) was a chief of the Blackfoot First Nation with a reputation as a peacemaker.
Pyroxferroite - Pyroxferroite (Fe+2,Mn,Ca)SiO3, also called pyroxferroit or pyroxferroita, is a silicate with a triclinic crystal structure. It has a hardness between 4.
Crystal structure - In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; which is periodically repeated in three dimensions on a lattice.
Liquid crystal - Liquid crystals are substances that exhibit a phase of matter that has properties between those of a conventional liquid, and those of a solid crystal. For instance, a liquid crystal (LC) may flow like a liquid, but have the molecules in the liquid arranged and oriented in a crystal-like way.
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