Palladium – Properties and Occurrences
Palladium has the chemical symbol Pd and the atomic number 46. It is a rare and gleaming silvery-white metal discovered by the English chemist William…
Geographic Minerals
Painite: Properties and Occurrences
Painite is an extremely rare type of borate mineral. It was discovered in Myanmar by Arthur C.D. Pain, a British mineralogist and gem dealer, who…
Pabstite: Properties and Occurrences
Pabstite is a mineral composed of barium, tin, and titanium that can be found in contact metamorphosed limestone. It is a mineral of the benitoite…
Pääkkönenite: Properties and Occurrences
Pääkkönenite is a metallic grey mineral with the molecular formula Sb2AsS2. It is named after Veikko Pääkkönen (1907–1980), a Finnish geologist. It is a fairly…
Speculum Metal
Speculum metal is a white brittle alloy composed of around two-thirds copper and one-third tin that may be polished to produce a highly reflecting surface.…
Antigorite: Properties and Occurrences
Antigorite is a lamellated, monoclinic mineral in the serpentine phylosilicate subgroup with the ideal chemical formula (Mg, Fe)3Si2O5OH4. It is a monoclinic layered-structured mineral with…
Onyx: Properties and Occurrences
Onyx is the name given to a parallel banded variant of the silicate mineral chalcedony. Agate and onyx are both layered chalcedony variants that differ…
Osumilite: Properties and Occurrences
Osumilite is a potassium-sodium-iron-magnesium-aluminium silicate mineral that is extremely rare. It was discovered in a volcanic rock in Sakkabira, Kyusyu, Japan, and was named after…
Otwayite: Properties and Occurrences
Otwayite, Ni2CO3(OH)2, is a hydrated nickel carbonate mineral. It is a green orthorhombic hydrated nickel carbonate mineral. It is green, with a hardness of 4,…
Ottrelite: Properties and Occurrences
Ottrelite is a form of chloritoid. Its empirical formula is (Mn, Fe, Mg)2Al4Si2O10(OH)4. It was originally described as a Mn-rich, but not necessarily Mn-dominant chloritoid,…
Coral Reefs’ ‘Taste’ and ‘Smell’ Provide Insights into a Dynamic Ecosystem
Coral reefs are biodiversity hotspots that are incredibly productive due to the large number of creatures that interact at the same time. A group of…
Osmium: Properties and Occurrences
Osmium is a lustrous, silvery metal that belongs to the platinum group of metals. It has the chemical symbol Os and the atomic number 76.…
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