For example, the structure of eudialyte
has now been determined, and there are those who contend that eudialyte
could be reclassified as a group containing more than 150 possible new minerals because of major elemental substitutions in various structural sites in the unit cell of that mineral.
The authors of the eudialyte
report (Johnsen et al, 2003) have given strong arguments for using unique names in this group.
No feldspars, nepheline, sodalite, aegirine-diopside, amphiboles or eudialyte
were found in this body, nor were there any zirconium minerals.
Villiaumite was seen here as rich red, gleaming cleavage faces to several centimeters across, in cabinet-size lumps; kovdorskite was on hand, as palest orange, glassy, wedge-shaped crystals to 1 cm in matrix coverages to 8 cm across; the very rare bobierrite was seen as sprays of pale blue, glassy crystals to 3 cm rising from matrix (these from the world's only significant bobierrite occurrence, the Zheleznyi mine, Kovdor massif, Kola Peninsula); and, front and center at the stand, a huge piece of nepheline/apatite matrix was seen to harbor a sharp, complete crystal of eudialyte
fully 8 cm across, rose-red inside but with a thin, opaque brown crust of wadeite.
Grishin proposed a fitting name for the pegmatite: the Palitra (in English, "palette"), in allusion to the large pods of brightly colored minerals (red villiaumite, pearly-white natrosilite, green aegirine, lilac ussingite, lemon-yellow vuonnemite, crimson sodalite, orange eudialyte
, salmon-pink serandite, dark-brown lomonosovite and lorenzenite, etc.) that had been exposed.
Other sporadic miarolitic constituents include eudialyte
, villiaumite, fluorapophyllite, calcite, biotite, fluorite and analcime.
Associated minerals are: microcline, aegirine, nepheline, magnesio-arfvedsonite, eudialyte
, lorenzenite, lamprophyllite, catapleiite, titanite, vinogradovite, tundrite-(Ce), apatite, neptunite, tsepinite-Na, kuzmenkoite-Zn, korobitsynite.
Relationship to other species: It is a member of the eudialyte
(2001) Feklichevite, N[a.sub.11]C[a.sub.9](F[e.sup.3+],F[e.sup.2+])[.sub.2]Z[r.sub.3]Nb[S[i.sub.25][O.sub.73]](OH,[H.sub.2]O,Cl,O)[.sub.5], a new mineral of the eudialyte
group from the Kovdor massif, Kola Peninsula.
Associated minerals are: natrolite, sodalite, aegirine, biotite, vinogradovite, titanite, eudialyte
, calcite, barytocalcite, fluorapatite, fluorite, djerfisherite, and molybdenite.