Theorems on Straight Lines and Plane
Theorems on Straight Lines and Plane In mathematics, the term “line” actually refers to the “straight line”. It is a one-dimensional figure that extends in…
Science
Labyrinthite: Properties and Occurrences
Labyrinthite is a very rare mineral of the eudialyte group. When compared to other species in the group, its structure is extremely complex – with…
Khomyakovite
Khomyakovite is an exceedingly rare mineral of the eudialyte group, with formula Na12Sr3Ca6Fe3Zr3WSi(Si9O27)2(Si3O9)2O(O,OH,H2O)3(OH,Cl)2. It is a mineral containing calcium, chlorine, hydrogen, iron, oxygen, silicon, sodium,…
Kentbrooksite
Kentbrooksite is a moderately rare mineral of the eudialyte group, with formula (Na,REE)15(Ca,REE)6Mn3Zr3NbSi[(Si9O27)2(Si3O9)2O2]F2·2H2O. It is a trigonal-ditrigonal pyramidal yellowish-brown mineral containing calcium, fluorine, hydrogen, la, ce,…
Axioms: Solid Geometry
Axioms: Solid Geometry Axioms involving reflection at a plane were approached through physical observations of reflection from a plane mirror. Axioms are general statements made…
Johnsenite-(Ce):Properties and Occurrences
Johnsenite-(Ce) is a very rare mineral of the eudialyte group, with formula Na12(Ce,La,Sr,Ca,[])3Ca6Mn3Zr3WSi(Si9O27)2(Si3O9)2(CO3)O(OH,Cl)2. It is a mineral containing calcium, chlorine, hydrogen, iron, oxygen, silicon, sodium,…
Ilyukhinite
Ilyukhinite is a very rare mineral of the eudialyte group, with formula (H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2·3H2O. The formula given is simplified and does not show the presence of…
Dihedral Angle
The dihedral angle is an angle between two distinct planes that are intersecting in any way. We can say that the interior angle between two…
Ikranite: Properties and Occurrences
Ikranite is a member of the eudialyte group, named after the Shubinov Institute of Crystallography of the Russian Academy of Sciences. Formula – (Na,H3O)15(Ca,Mn,REE)6Fe23+ Zr3([…
Golyshevite: Properties and Occurrences
Golyshevite is a rare mineral of the eudialyte group, with formula Na10Ca3Ca6Zr3Fe2SiNb(Si3O9)2(Si9O27)2CO3(OH)3•H2O. It was named for Russian crystallographer Vladimir Mikhailovich Golyshev of the Mordvinian State…
Georgbarsanovite
Georgbarsanovite is a very rare mineral of the eudialyte group, formerly known under the unaccepted name as barsanovite, with formula Na12(Mn, Sr, REE)3Ca6Fe32+Zr3NbSi(Si3O9)2(Si9O27)2O4Cl2•H2O. The original…
Angle between a Straight Line and a Plane
Angle between a Straight Line and a Plane: In mathematics, the term “line” actually refers to the “straight line”. It is a one-dimensional figure that…
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