Euxenite-(Y)
Euxenite or euxenite-(Y) is a brownish black mineral with a metallic luster. It is a mineral that is sometimes called a “trash can mineral”. Because…
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Zirsilite-(Ce)
Zirsilite-(Ce) is a very rare mineral of the eudialyte group, with formula (Na,[])12(Ce, Na)3 Ca6 Mn3Zr3NbSi(Si9O27)2(Si3O9)2O(OH)3(CO3)•H2O. The original formula was extended to show the presence…
Voronkovite
Voronkovite is a very rare mineral of the eudialyte group with the formula Na15(Na, Ca, Ce)3(Mn, Ca)3Fe3Zr3Si2Si24O72(OH, O)4Cl·H2O. It is a trigonal-pyramidal yellowish-brown mineral containing…
Converse of the Theorem on Parallel Lines and Plane
Converse of the theorem on parallel lines and plane: Theorem: If two straight lines are parallel and if one of them is perpendicular to a…
Taseqite: Properties and Occurrences
Taseqite is a rare mineral of the eudialyte group, with formula Na12Sr3Ca6Fe3Zr3NbSiO(Si9 O27)2(Si3O9)2(O, OH, H2O)3Cl2. It occurs in a cavity in a late-stage hydrothermal albitite…
Rastsveatevite
Rastsveatevite is a rare mineral of the eudialyte group with the formula Na27K8Ca12Fe3Zr6Si4[Si3O9]4[Si9O27]4(O, OH, H2O)6Cl2. It is a trigonal-ditrigonal pyramidal pink mineral containing calcium, chlorine,…
Theorem on Parallel Lines and Plane
Theorem on Parallel Lines and Plane Theorem: If two straight lines are parallel and if one of them is perpendicular to a plane, then the…
Raslakite: Properties and Occurrences
Raslakite is a rare mineral of the eudialyte group with the formula Na15 Ca3Fe3(Na,Zr)3Zr3(Si,Nb)SiO(Si9O27)2(Si3O9)2(OH,H2O)3(Cl,OH). It is a trigonal-ditrigonal pyramidal brownish-red mineral containing calcium, chlorine, hydrogen,…
Oneillite: Properties and Occurrences
Oneillite is a rare mineral of the eudialyte group with the formula Na15Ca3Mn3Fe23+Zr3NbSiO(Si3O9)2(Si9O27)2(O,OH,H2O)3(OH,Cl)2. It was named for John Johnston O’Neill, as a geologist with the…
Mogovidite: Properties and Occurrences
Mogovidite is a very rare mineral of the eudialyte group, with formula Na9(Ca,Na)6Ca6(Fe3+,Fe2+)2 Zr3[]Si(Si9O27)2(Si3O9)2(CO3)(OH, H2O)4. It occurs in a nepheline-pectolite vein within ijolite. The formula given…
Theorem on Co-planar
Theorem on Co-planar A set of points, lines, line segments, rays or any other geometrical shapes that lie on the same plane are said to…
Manganoeudialyte
Manganoeudialyte is an moderately rare mineral of the eudialyte group, with formula Na14Ca6Mn3Zr3Si2[Si24O72(OH)2]Cl2·4H2O. The formula given is one of the forms that can be given,…
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