Britholite-(Ce) is a rare

radioactive Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is conside ...

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 ...

. It comes in a variety of different colors. Its type locality is Naujakasik (Naajakasik), Tunulliarfik Fjord, Ilímaussaq complex,

Narsaq Narsaq ( Danish: ''Nordprøven'') is a town in the Kujalleq municipality in southern Greenland. The name ''Narsaq'' is Kalaallisut for "Plain", referring to the shore of Tunulliarfik Fjord where the town is located. History People have liv ...

Kujalleq Kujalleq (Greenlandic language, Greenlandic: , ) is a municipality on the southern tip of Greenland, operational from 1 January 2009. The administrative center of the municipality is in Qaqortoq (formerly called Julianehåb). Creation The munic ...

Greenland Greenland is an autonomous territory in the Danish Realm, Kingdom of Denmark. It is by far the largest geographically of three constituent parts of the kingdom; the other two are metropolitan Denmark and the Faroe Islands. Citizens of Greenlan ...

Discovery

The mineral was first discovered by Gustaf Flink in 1897 inside a nepheline-syenite at Naujakasik, Ilímaussaq complex,

. It was named after the

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

word (') which means "weight" referring to its high

specific gravity Relative density, also called specific gravity, is a dimensionless quantity defined as the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for solids and liquids is nea ...

, it was later named britholite-(Ce) due to the high amounts of

cerium Cerium is a chemical element; it has Chemical symbol, symbol Ce and atomic number 58. It is a hardness, soft, ductile, and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it ...

in its composition.

References

External links

"Britholite-(Ce) Mineral Data"
Minerals Hexagonal minerals Minerals in space group 176 Radioactive minerals Silicate minerals {{Mineral-stub