Libethenite is a mineral named after the former name of the city of Liptovsky Mikulas in Slovakia. It is spelled as /lɪˈbɛθənaɪt/ in IPA phonetic transcription. The first syllable "li" is pronounced as "li" in "lift", the second syllable "be" is pronounced as "be" in "bed", the third syllable "the" is pronounced as "thee" in "theme", and the fourth syllable "nite" is pronounced as "nite" in "night". The spelling and phonetic transcription of Libethenite help to clearly identify and pronounce this mineral name.
Libethenite is a mineral that belongs to the phosphate class of minerals. It is a rare secondary copper mineral found in oxidized copper ore deposits, usually occurring in small quantities. The name "libethenite" is derived from the type locality of the Minas da Panasqueira mine in Portugal, where it was first discovered.
Physically, libethenite is characterized by its distinct emerald-green color, which can sometimes appear as dark green or even blackish-green. It typically forms in small prismatic or tabular crystal habits, often occurring as radiating aggregates or crusts. The mineral has a vitreous to silky luster, and its color is a result of its copper content.
Chemically, libethenite is composed of copper, phosphate, hydroxide, and water molecules. Its chemical formula is Cu2(PO4)(OH). It has a relatively moderate hardness of approximately 4 on the Mohs scale, and its specific gravity ranges from 3.87 to 4.02.
Due to its rarity and beautiful green color, libethenite is highly sought after by mineral collectors. However, it does not have any significant industrial uses. It is primarily valued for its aesthetic appeal and its presence in mineral collections. Libethenite is often associated with other copper minerals such as malachite and azurite, and its presence can indicate the presence of copper ores in a given locality.
Phosphate of copper, occurring in many copper-mines in rhombic prisms, or in radiated masses of an olive-green colour, resinous lustre, and brittle.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "libethenite" derives from the name of the town Libethen (now Libethenovo) in present-day Slovakia, where the mineral was first discovered in 1823. The mineral was then named after this locality.