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| | Journal (article/letter/editorial) | | structure is a niobioaeschynite-(Y), with Pnma space group, cell parameters a = 10.804(1), b = 7.680(1), c...confirmed and extended to the other members of the group [namely samarskite-(Yb), calciosamarskite,
and ishikawaite]...samarskite mineral group should be considered no longer as an independent
mineral group but as part of the...the aeschynite group of minerals.
It is finally suggested that the rare crystalline sub-micrometric ixiolite...related oxides, possibly
belonging to the samarskite group minerals, whose definitive
identification could | 👁 Image
| Guastoni, Alessandro, Secco, Luciano, Škoda, Radek, Nestola, Fabrizio, Schiazza, Mariangela, Novák, Milan, Pennacchioni, Giorgio (2019) Non-Metamict Aeschynite-(Y), Polycrase-(Y), and Samarskite-(Y) in NYF Pegmatites from Arvogno, Vigezzo Valley (Central Alps, Italy) Minerals, 9 (5) 313 doi:10.3390/min9050313 | Journal (article/letter/editorial) | | pegmatites contain AB2 O6 aeschynite group minerals and
ABX2 O8 euxenite group minerals as typical accessory...allow
for the accurate determination of the space group. According to the chemical compositions defined...Introduction
Complex REE–Nb–Ta–Ti oxides (aeschynite-, euxenite-, and samarskite-group minerals) are...Černý and Ercit [1]). Aeschynite- and euxenite-group
minerals have a general formula AB2 O6 where the...b-axis [2] occupied by Ti, Nb, Ta. and W. Aeschynite-group
Minerals 2019, 9, 313; doi:10.3390/min9050313
www | 👁 Image
| | Book (edition) | | Class 53 Insular SiO, Groups and Other Anions or Complex
Cations
Borosilicates and Some Beryllosilicates...followed in this
edition. The many and often very complex silicate minerals are here classified
for the first...Species
containing more than one anion or anion group may be assigned to a separate
class or may be assigned...specifies the atomic (cation to anion, or to anion group) ratio for the
mineral. This and the remaining numbers...appropriate Dana number. When recognized, membership in a group is
noted. Occasionally, the phrase “an inadequately | 👁 Image
| | Report (volume) | | environments mineral
assemblages are extremely complex, with more than I O species common in many cm-size...• •••••••98
Uranium(IV) phosphates: rhabdophane group ........................................... 105.................. .. .............. 283
Breccia-complex uranium deposits .............................................................. 355
Crandallite group ................................................................................... 378
Platinum group elements (PGE): Ru, Rh and Pd ................. |
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