Frankdicksonite
Geographic Minerals

Frankdicksonite

Frankdicksonite is a halide mineral with the chemical formula BaF2 which corresponds to the chemical compound barium fluoride. It is an isometric-hexoctahedral colorless mineral containing…
Frankamenite
Geographic Minerals

Frankamenite

Frankamenite is the fluorine-dominate variation of the rare mineral canasite with a general formula of K3Na3Ca5(Si12O30)[F,(OH)]4·(H2O). It is a triclinic-pedial mineral containing calcium, fluorine, hydrogen,…
Comparison of Surds
Mathematic

Comparison of Surds

Definitions of surds: A root of a positive real quantity is called a surd if its value cannot be exactly determined. It is a number that…
Franckeite: Properties and Occurrences
Geographic Minerals

Franckeite: Properties and Occurrences

Franckeite, chemical formula Pb5Sn3Sb2S14, belongs to a family of complex sulfide minerals.  It is a triclinic-pinacoidal mineral containing antimony, iron, lead, sulfur, and tin. It…
Francevillite: Properties and Occurrences
Geographic Minerals

Francevillite: Properties and Occurrences

Francevillite is a uranyl-group vanadate mineral in the tyuyamunite series. Its chemical formula is (Ba, Pb)(UO2)2V2O8·5(H2O). It is an orthorhombic-dipyramidal mineral containing barium, hydrogen, lead,…
Fraipontite: Properties and Occurrences
Geographic Minerals

Fraipontite: Properties and Occurrences

Fraipontite is a zinc-aluminum silicate mineral with a formula of (Zn, Al)3(Si, Al)2O5(OH)4. It is a member of the kaolinite-serpentine mineral group and occurs as…
Fourmarierite
Geographic Minerals

Fourmarierite

Fourmarierite is a secondary uranium-lead mineral. It was named for the Belgian geologist Paul Fourmarier (1877–1970). It is a mineral consisting of a hydrous oxide…
Direct Variation in Mathematics
Mathematic

Direct Variation in Mathematics

“Variation” defines a concept that deals with variability in mathematics. Variation is defined by any change in some quantity due to change in another. We…
Fougèrite: Properties and Occurrences
Geographic Minerals

Fougèrite: Properties and Occurrences

Fougèrite is a relatively recently described naturally occurring green rust mineral. It is a trigonal clay mineral that is chemically and structurally related to green…
Forsterite: Properties and Occurrences
Geographic Minerals

Forsterite: Properties and Occurrences

Forsterite (Formula- Mg2SiO4) is the magnesium-rich end-member of the olivine solid solution series. It is a crystalline magnesium silicate. It is best known for having,…
Fornacite: Properties and Occurrence
Geographic Minerals

Fornacite: Properties and Occurrence

Fornacite is a rare lead, copper chromate arsenate hydroxide mineral with the formula: Pb2Cu(CrO4)(AsO4)(OH). It is a monoclinic-prismatic mineral containing arsenic, chromium, copper, hydrogen, lead,…
Classification of Triangles on the Basis of their Angles
Mathematic

Classification of Triangles on the Basis of their Angles

Triangle is a plane figure with three straight sides and three angles. The three angles always add to 180°. The vertex is a corner of the…
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