Friedelite is a mineral
in the
pyrosmalite group.
The mineral is named after
Charles Friedel
Charles Friedel (; 12 March 1832 – 20 April 1899) was a French chemist and Mineralogy, mineralogist.
Life
A native of Strasbourg, France, he was a student of Louis Pasteur at the University of Paris, Sorbonne. In 1876, he became a professor of ...
.
Name
The name friedelite is only for pure
Mn end-member of the group pyrosmalite.
The mineral was named in 1876 by
Emile Bertrand after
Charles Friedel
Charles Friedel (; 12 March 1832 – 20 April 1899) was a French chemist and Mineralogy, mineralogist.
Life
A native of Strasbourg, France, he was a student of Louis Pasteur at the University of Paris, Sorbonne. In 1876, he became a professor of ...
.
Characteristics
Color
Its color can be pale pink, dark brownish red, red, brown, or orangish red. It is normally found in 1 to 5 carats as well as nontransparent.
Fluorescence
The mineral has a colorful luminescense under
UV light
Ultraviolet radiation, also known as simply UV, is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight and constitutes about 10% of t ...
.
With the
fluorescence
Fluorescence is one of two kinds of photoluminescence, the emission of light by a substance that has absorbed light or other electromagnetic radiation. When exposed to ultraviolet radiation, many substances will glow (fluoresce) with colore ...
being red, but at rare times it has a green or yellow fluorescence.
References
{{Phyllosilicates
Minerals