The spelling of the word "hemicosmites" may seem complicated, but it can be broken down using IPA phonetic transcription. The word begins with the "he-" sound, followed by "m-i-c-o-s-m-i-t-e-s." The "i" in the middle of the word is pronounced like "eye," while the "o" sounds like "ah." The word ends with the "-e-s" sound. In terms of definition, hemicosmites refers to a type of fossilized insect that was once common in ancient forests.
Hemicosmites is a noun that refers to a scientific term used in mineralogy to describe a unique crystalline structure or habit of minerals. Specifically, it pertains to a type of mineral crystal that exhibits a complex six-fold symmetry combined with a dodecagonal (12-sided) outline. The term "hemicosmites" originates from the Greek words "hemi" meaning half and "kismos" signifying division.
Minerals exhibiting hemicosmitic characteristics are often identified by their distinct polygonal shape and symmetry, resembling a regular hexagon with concave edges dividing the shape into twelve equal parts. This unique crystal habit is mostly observed in certain minerals of the tetragonal crystal system, which have undergone specific growth conditions and possess internal structural arrangements that lead to this specific shape.
The hemicosmitic structure is a result of the interaction between the atomic arrangement of the mineral and its external growth environment. These minerals can be found in a variety of geological settings, such as deep-seated intrusive rocks, hydrothermal veins, or metamorphic environments. The identification and study of hemicosmites contribute to the field of mineralogy, aiding in the understanding of crystallography, mineral formation processes, and the evolution of geological systems.
In conclusion, hemicosmites are a unique group of minerals characterized by a six-fold symmetry combined with a twelve-sided outline, forming a distinctive crystal habit observed in certain minerals of the tetragonal crystal system.
In geol., a cystedean characterised by its spherical form, and composed of numerous plates.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.