Fluellite: Properties and Occurrence
Fluellite is a mineral with the chemical formula Al2(PO4)F2(OH)•7H2O. It is a mineral consisting of aluminum fluoride in colorless or white crystals. It is an…
Geographic Minerals
Fluckite: Properties and Occurrence
Fluckite is an arsenate mineral with the chemical formula CaMnH2(AsO4)2·2(H2O). It is a rare mineral of post-mine origin that forms as a low-temperature product of…
Fletcherite: Properties and Occurrences
Fletcherite is a rare thiospinel sulfide mineral with formula Cu(Ni, Co)2S4. It is an isometric-hexoctahedral steel-gray mineral containing cobalt, copper, nickel, and sulfur. It is…
Fichtelite: Properties and Occurrence
Fichtelite is a rare white mineral found in fossilized wood from Bavaria. It is a rare white monoclinic mineral found in fossilized wood from Bavaria.…
Fettelite: Properties and Occurrences
Fettelite, also known as sanguinite, is a mercury-sulfosalt mineral with the chemical formula Ag16HgAs4S15. It is a rare Silver Mercury Arsenic Sulfosalt forming silvery to…
Orthorhombic Ferroselite
Orthorhombic ferroselite and its isometric polymorph dzharkenite are iron selenides of general formula FeSe2 precipitated under reducing conditions in anoxic environments. It is an orthorhombic-dipyramidal…
Post-perovskite (pPv)
Post-perovskite (pPv) is a high-pressure phase of magnesium silicate (MgSiO3). It is a high-pressure phase of several minerals, including magnesium silicate. It is composed of…
Ilmenite: Properties and Ooccurrences
Ilmenite is the titanium-iron oxide mineral with the idealized formula FeTiO3. It is a common accessory mineral in igneous rocks, sediments, and sedimentary rocks in many…
Ferronigerite-2N1S
Ferronigerite-2N1S is an iron, tin, alumino-hydroxide mineral that naturally occurs around sillimanite-quartz veins. It is very rarely found in gem-quality, cut-able material. Related to, and…
Ferro-actinolite
Ferro-actinolite is the ferrous iron-rich endmember of the actinolite-tremolite continuous solid solution series of the double chain calcareous amphibole group of inosilicate minerals. It is…
Ferrimolybdite: Properties and Occurrences
Ferrimolybdite is a hydrous iron molybdate mineral with formula: Fe23+(MoO4)3·8(H2O) or Fe23+(MoO4)3·n(H2O). It is an orthorhombic mineral containing hydrogen, iron, molybdenum, and oxygen. It occurs…
Ferrihydrite
Ferrihydrite (Fh) is a widespread hydrous ferric oxyhydroxide mineral at the Earth’s surface and a likely constituent in extraterrestrial materials. Ferrihydrite is a metastable mineral.…
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