Anandite is a rare

phyllosilicate Silicate minerals are rock-forming minerals made up of silicate groups. They are the largest and most important class of minerals and make up approximately 90 percent of Earth's crust. In mineralogy, silica (silicon dioxide, ) is usually consid ...

with formula . It crystallizes in the

monoclinic In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in the orthorhombic ...

crystal system In crystallography, a crystal system is a set of point groups (a group of geometric symmetries with at least one fixed point). A lattice system is a set of Bravais lattices. Space groups are classified into crystal systems according to their poi ...

. It is black in color with a glassy luster and a near perfect cleavage. It was first described in 1967 for an occurrence in the Wilagedera Prospect of the North Western Province of

Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...

in bands of

iron Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in ...

ore. It has also been found in

Big Creek Big Creek may refer to: In Australia * Big Creek, Tasmania, a tributary of the Inglis River in Tasmania, Australia In Belize * Big Creek, Belize, a sea port in Belize In Canada * Big Creek (British Columbia), a tributary of the Chilcotin River * ...

Fresno County Fresno County (), officially the County of Fresno, is a county located in the central portion of the U.S. state of California. As of the 2020 Census, the population was 1,008,654. The county seat is Fresno, the fifth-most populous city in Cal ...

and in Trumball Peak in

Mariposa County, California Mariposa County () is a county in the U.S. state of California. As of the 2020 U.S. Census, the population was 17,131. The county seat is Mariposa. It is located in the western foothills of the Sierra Nevada mountains, north of Fresno, eas ...

as well as the

Sterling Mine Sterling may refer to: Common meanings * Sterling silver, a grade of silver * Sterling (currency), the currency of the United Kingdom ** Pound sterling, the primary unit of that currency Places United Kingdom * Stirling, a Scottish city w ...

New Jersey New Jersey is a U.S. state, state in the Mid-Atlantic States, Mid-Atlantic and Northeastern United States, Northeastern regions of the United States. It is bordered on the north and east by the state of New York (state), New York; on the ea ...

. It was named for

Ananda Kentish Coomaraswamy Ananda Kentish Muthu Coomaraswamy ( ta, ஆனந்த குமாரசுவாமி, ''Ānanda Kentiś Muthū Kumāraswāmī''; si, ආනන්ද කුමාරස්වාමි ''Ānanda Kumārasvāmī''; 22 August 1877 − 9 Septem ...

(1877–1947), who was the director of the Mineral Survey of Ceylon, Sri Lanka at that time. Anandite is a member of the

mica Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into extremely thin elastic plates. This characteristic is described as perfect basal cleavage. Mica is ...

group of minerals. Other minerals that anandite is associated with include:

magnetite Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe2+Fe3+2O4. It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. With ...

chalcopyrite Chalcopyrite ( ) is a copper iron sulfide mineral and the most abundant copper ore mineral. It has the chemical formula CuFeS2 and crystallizes in the tetragonal system. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mo ...

pyrite The mineral pyrite (), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic luster and pale brass-yellow hue giv ...

pyrrhotite Pyrrhotite is an iron sulfide mineral with the formula Fe(1-x)S (x = 0 to 0.2). It is a nonstoichiometric variant of FeS, the mineral known as troilite. Pyrrhotite is also called magnetic pyrite, because the color is similar to pyrite and it ...

and

baryte Baryte, barite or barytes ( or ) is a mineral consisting of barium sulfate ( Ba S O4). Baryte is generally white or colorless, and is the main source of the element barium. The ''baryte group'' consists of baryte, celestine (strontium sulfate), ...

References

Mica group Monoclinic minerals Minerals in space group 12 Minerals described in 1967 {{silicate-mineral-stub