Mineralpedia Details for Cacoxenite
Named for the Greek words kakos, meaning “bad,” and xenizomenos, meaning “guest,” in reference to its presence in iron ores, which the phosphate content of the mineral degrades the quality of iron from the ore. Cacoxenite is an uncommon mineral in the broad sense, but is a common accessory in oxidized magnetite and limonite iron ore, and can also be found in iron and manganese bearing novaculites and in iron-rich sediment and soil. Localities for Cacoxenite are found in the Czech Republic, Germany, France, Ireland, Sweden, and the United States, among others. Orange, reddish orange, golden yellow, or brownish yellow acicular crystals in compact, concentric spherical to radial aggregates or coatings.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/cacoxenite.pdf
- Crystal System
- Crystal Habit
- Radial, Acicular, Stellate
- None, None, None
- brownish yellow, green, yellow, golden yellow, red yellow
- Hexagonal - Dihexagonal Dipyramidal
- View Cacoxenite
- View Cacoxenite
Cacoxenite from Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States
Golden acicular crystals in tiny 1mm and less radial balls.
Stunning golden brown, acicular radial sprays of Cacoxenite to 1mm.
Sprays of golden Cacoxenite to about 1mm well protected in a seam 6cm long and 1.5cm wide.
Cacoxenite from Těškov quarry, SE of Prague, Bohemia, Czech Republic
Golden fibrous sprays to 1mm.
Cacoxenite from San Salvador pit, Tyrone mine, New Mexico, United States
Golden acicular sprays to about 0.75mm lining vugs.
Golden straw-like colored radial sprays of Cacoxenite to 0.5mm.
Cacoxenite from South Rasmussen Ridge mine, Soda Springs, Caribou Co., Idaho, United States
Gold-yellow thin botryoidal Cacoxenite totally covering one side of black Shale matrix.
Cacoxenite from Roosevelt mine, Custer Co., South Dakota, United States
Small orange sphericules of Cacoxenite less than 1mm.
Cacoxenite from Three Oaks Gap, Polk Co., Arkansas, United States
Cacoxenite as a thin orange film alteration over light green botryoidal Kidwellite and Dufrenite crystals to 4mm.
Sprays of Cacoxenite to 1mm.
Cacoxenite from Moore's Mill, Cumberland Co., Pennsylvania, United States
Golden yellow sprays to 1mm.
Cacoxenite from Indian Mountain, Cherokee Co., Alabama, United States
Golden spherules and fibrous sprays of Cacoxenite with purple balls of Strengite.
Cacoxenite from Kamariza mine, Laurium, Greece
Golden fibrous hairs of Cacoxenite.
Cacoxenite from Fumade, Castelnau-de-Brassac, Tarn, Midi-Pyrénées, France
Radial sprays of orange Cacoxenite to almost 1mm.
Cacoxenite from Augusta Ridge, Cherokee Co., Alabama, United States
- Special Info
- Specimen & Photo of: Henry Barwood Professor, Earth Science Department of Chemistry and Physics Troy University
The first two photos are those by Dr. Henry Barwood. Micro Cacoxenite fibers with well formed prisms and pyramidal terminations. FOV is about .6 X .4mm. Imaged with a Canon 40D, 23mm Nikon objective and 300mm Canon FD telephoto in a tube configuration and stacked using Combine Z software.
The second set were taken by Tom Loomis: Cacoxenite sprays to about 0.75mm. There is thick, rich coverage like carpet in places and also singular sprays throughout.
Cacoxenite from Leveäniemi Iron mine, Svappavaara, Lappland, Sweden
Golden fibrous hairs of Cacoxenite in iron ore matrix of Hematite. Uncommon, at least on the market for this locality.