Fengchengite
Fengchengite is a rare mineral of the eudialyte group with the formula Na12[]3(Ca, Sr)6Fe33+Zr3Si(Si24O73)(H2O, OH)3(OH, Cl)2. The formula is simplified as it does not show…
Geographic Minerals
Feklichevite
Feklichevite is a rare mineral of the eudialyte group with the formula Na11Ca9(Fe3+, Fe2+)2Zr3NbSi(Si3O9)2 (Si9O27)2. It is a trigonal-ditrigonal pyramidal mineral containing calcium, cerium, chlorine,…
Dualite: Properties and Occurrences
Dualite is a very rare and complex mineral of the eudialyte group, its complexity being expressed in its formula: Na30(Ca, Na, Ce, Sr)12(Na, Mn, Fe,…
Davinciite: Properties and Occurrence
Davinciite is a very rare mineral of the eudialyte group, with the simplified formula Na12K3Ca6Fe32+Zr3(Si2O73OH)Cl2. The formula given does not show the presence of cyclic…
Carbokentbrooksite
Carbokentbrooksite is a very rare mineral of the eudialyte group, with formula (Na,[])12(Na, Ce)3Ca6Mn3Zr3NbSiO(Si9O27)2(Si3O9)2(OH)3(CO3).H2O. It is a trigonal-ditrigonal pyramidal yellow mineral containing calcium, carbon, cerium,…
Aqualite: Properties and Occurrences
Aqualite is a very rare mineral of the eudialyte group, with formula (H3O)8(Na, K, Sr)5Ca6Zr3SiSi(Si24O66)(OH)9 Cl. The formula given does not show the presence of…
Andrianovite
Andrianovite is a very rare mineral of the eudialyte group, with formula Na12(K, Sr, Ce)6Ca6(Mn, Fe)3Zr3NbSi(Si3O9)2(Si9O27)2O(O, H2O, OH)5. It was named after Valerii Ivanovich Andrianov,…
Eudialyte: Properties and Occurrences
Eudialyte, whose name derives from the Greek phrase ‘eu dialytos’, meaning “well decomposable”, is a somewhat rare, nine-member ring cyclosilicate mineral, which forms in alkaline…
Eucryptite
Eucryptite is lithium bearing aluminum silicate mineral with formula LiAlSiO4. It is one of the few silicate minerals that have a trigonal symmetry. This symmetry…
Euclase: Properties and Occurrences
Euclase is a beryllium aluminum hydroxide silicate mineral [BeAlSiO4(OH)]. It is not a well-known gemstone but is more well known by mineral collectors. It crystallizes…
Euchroite: Properties and Occurrences
Euchroite is a hydrated copper arsenate hydroxide mineral with formula: Cu2AsO4OH·3H2O. It is a vitreous green to emerald green mineral crystallizing in the orthorhombic system.…
Ettringite: Properties and Occurrences
Ettringite is a hydrous calcium aluminum sulfate mineral with formula: Ca6Al2(SO4)3(OH)12·26H2O. It is a trigonal hydrous calcium aluminum sulfate mineral. is a hydrous calcium aluminum…
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