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Azurite is found in the same geologic settings as its sister mineral, malachite, though it is usually less abundant. Both minerals occur widely as supergene copper minerals, formed in the oxidized zone of copper ore deposits. Here they are associated with cuprite, native copper, and various iron oxide minerals. [8]
Azurite pigment typically includes traces of malachite and cuprite; both minerals are found alongside azurite in nature, and they may account for some of the green discoloration of the pigment. [ 1 ] : 26 The particle size of azurite pigment has been shown to have a significant effect on its chromatic intensity, and the manner of grinding and ...
3) 2 (OH) 2, a blue crystalline solid also known as the mineral azurite. It too has been used as pigment, sometimes under the name mountain blue or blue verditer. Both malachite and azurite can be found in the verdigris patina that is found on weathered brass, bronze, and copper. The composition of the patina can vary, in a maritime environment ...
The iron-nickel group is characterized by several iron-nickel alloy species. Two examples are kamacite and taenite, which are found in iron meteorites; these species differ by the amount of Ni in the alloy; kamacite has less than 5–7% nickel and is a variety of native iron, whereas the nickel content of taenite ranges from 7–37%. Arsenic ...
Researchers found that four of the 26 artefacts, including three bracelets and a pin, were made of meteoric iron, likely from a single meteorite source. They found that the objects used iron from ...
The only known, terrestrial iron in metallic form was found as meteorites, which were deposited onto the Earth from outer space. Telluric iron is so named after the Latin word Tellus , meaning "Earth" (the planet, as opposed to terra meaning "earth": the land, ground or soil), combined with the suffix -ic meaning "of" or "born from ...
Water and other volatiles, if present, increase the total. Earth was volatile-rich, with an atmosphere composed of N 2, CO 2 and water, and an ocean that became steadily more saline. Volcanism, outgassing and hydration gave rise to hydroxides, hydrates, carbonates and evaporites.
Previous studies found water in glass beads formed by lunar volcanic activity, based on samples returned by the Apollo moonwalkers more than a half-century ago. These, too, could provide water not ...