LAPIEITE Meaning and
Definition
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Lapieite is a mineral that belongs to the sulfate mineral group, specifically classified as a hydrate. It is a relatively rare mineral that was first discovered in 1957 in the La Fossa crater, Vulcano Island in Italy. The name "lapieite" was given to this mineral in honor of Italian mineralogist Giancarlo Parodi.
As a mineral, lapieite has a distinctive chemical composition consisting of lead, copper, and sulfur. Its chemical formula is PbCu(SO4)(OH)2. It occurs as small crystals or granular masses with a vitreous to pearly luster. Lapieite commonly appears in shades of green, but it can also exhibit yellow, gray, or grayish-white colors. Its streak is white.
The crystal structure of lapieite features a complex arrangement of atoms that forms in the orthorhombic crystal system. It possesses perfect cleavage on {010} and displays a brittle tenacity. Lapieite has an average density of about 5.86 grams per cubic centimeter and is considered quite heavy for a mineral.
Aside from its occurrence in Italy, lapieite has also been found in other volcanic environments around the world. It typically forms as a secondary mineral within oxidized hydrothermal ore deposits. Due to its limited abundance and relatively low commercial value, lapieite has no significant industrial applications. However, it holds importance in the field of mineralogy as a unique and intriguing member of the sulfate mineral group.
