mineral
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Mi ...
, with the
chemical formula
A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as pare ...
Switzerland
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
Lima Region
The Department of Lima (), known as the Department of the Capital () until 1823, is a department and region located in the central coast of Peru; the seat of the regional government is Huacho.
Lima Province, which contains the city of Lima, ...
,
Peru
Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...
; at
Tsumeb
Tsumeb (; ) is a city of around 35,000 inhabitants and the largest town in the Oshikoto Region, Oshikoto region in northern Namibia.
Tsumeb, since its founding in 1905, has been primarily a mining town. The town is the site of a deep mine (the ...
,
Oshikoto Region
Oshikoto is one of the fourteen regions of Namibia, named after Lake Otjikoto. Its capital is Omuthiya. Further major settlements in the region are Tsumeb, Otjikoto's capital until 2008, and Oniipa. , Oshikoto had 112,170 registered voters.
Ge ...
,
Namibia
Namibia, officially the Republic of Namibia, is a country on the west coast of Southern Africa. Its borders include the Atlantic Ocean to the west, Angola and Zambia to the north, Botswana to the east and South Africa to the south; in the no ...