The chemical formula of mineral Mixite is indicated by BiCu6(AsO4)3(OH)6-3H2O or Hydrated Bismuth Copper Arsenate Hydroxide. Mixite is actually a Phosphate mineral. Mixite is most commonly used as mineral specimen and it is most often found exhibiting interesting images when viewed with the aid of polarizing light microscope used in optical mineralogy. Mixite is only one of the known bismuth minerals and probably one of even fewer bismuth arsenates known in the mineral world. Mixite is said to be the best known bismuth arsenate mineral. But it is still a rare mineral species. Mixite is truly a wonderful addition to ones mineral collections. It can be found forming nice radial clusters called spherules and made up of fine acicular crystals that could appear more splendidly exhibited when viewed with the aid of petrographic polarizing microscope used in optical mineralogy.

            Mixite is most commonly found in green, emerald green, blue green, yellow green, or off white in appearance and could appear more fascinatingly interesting when viewed with the aid of polarizing microscopes. Mineral Mixite is also most commonly found showing vitreous or silky to dull luster when viewed in reflected light of polarizing microscope used in the field of optical mineralogy. Mixite has no discernible cleavage even when it is closely evaluated with the aid of petrographic polarizing microscope used in the field of optical mineralogy. Mixite is also most commonly found exhibiting fibrous fracture when it is viewed with the aid of polarized microscope. The hardness measure of mineral Mixite when it is evaluated using the Mohs scale method is usually ranging from 3 to 4. When specimen of Mixite is rubbed on a white porcelain streak plate, it is most commonly found leaving a light green streak. The specific gravity measure of the mineral Mixite is approximately 3.8 grams per cubic centimeters to 4.0 grams per cubic centimeters, which is above average for translucent minerals.

            Most Mixite crystals are found transparent to translucent in appearance. Mixite is known to crystallize in the hexagonal system of crystal formation. The crystal habits of mineral Mixite as described in the field of optical mineralogy usually includes radiating clusters, tufts or spherules of acicular or fibrous crystals, also massive, capillary and earthy. Mixite is mst commonly found associated with other minerals such as wulfenite, mimetite, emplectite, limonite, malachite, barite, and many more.   The best field indicators of Mixite include color, density, crystal habit, and associations with bismuth ores. Mixite is most commonly found forming in the oxidation zone of metal ores that probably contained primary bismuth sulfides. Mixite notably occurs at several localities including Germany, Mexico, France, Czechoslovakia, and some areas in USA.