Ferropericlase
Ferropericlase or magnesiowüstite is a magnesium/iron oxide [(Mg, Fe)O] that is interpreted to be one of the main constituents of the Earth’s lower mantle together…
Science
Order of a Surd
Order of a Surd Definitions of surds: A root of a positive real quantity is called a surd if its value cannot be exactly determined.…
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…
Induction Proof – Problems with Solutions
Induction Proof – Problems with Solutions Mathematical induction is a technique for proving a statement – a theorem, or a formula — that is asserted…
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.…
Ferrierite: Properties and Occurrence
The ferrierite group of zeolite minerals (the FER structure) consists of three very similar species: ferrierite-Mg, ferrierite-Na, and ferrierite-K, based on the dominant cation in…
Feroxyhyte
Feroxyhyte is an oxide/hydroxide of iron, δ-Fe3+ O(OH). It is a hexagonal oxide/hydroxide of iron that occurs in manganese-iron nodules on the Pacific Ocean floor,…
Fergusonite: Properties and Occurrences
Fergusonite is a mineral comprising a complex oxide of various rare-earth elements. It is a dark mineral consisting of oxides of yttrium and erbium and…
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