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 consi ...

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2 ...

with the

chemical formula In chemistry, 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 symbol ...

(Ce,Ca)(SiO)OH. It comes in a variety of different colors. Its type locality is Naujakasik (Naajakasik),

Tunulliarfik Fjord Tunulliarfik Fjord (old spelling: ''Tunugdliarfik'') is a fjord near Qaqortoq in the Kujalleq municipality in southern Greenland. It is the inner section of Skovfjord (Skovfjorden). In times of the Norse settlement in southern Greenland, it was kn ...

, Ilímaussaq complex,

Narsaq Narsaq 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 lived in the area for thousands o ...

Kujalleq Kujalleq ( Greenlandic: , da, Den Syden, lit=The South) 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 ...

Greenland Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland i ...

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: Greece 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 ...

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

specific gravity Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest ...

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

cerium Cerium is a chemical element with the symbol Ce and atomic number 58. Cerium is a soft, ductile, and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it often shows the +3 ...

in its composition.

References

External links

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