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alnaperboeite

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Journal Article
Published: 01 January 2014
American Mineralogist (2014) 99 (1): 157-169.
... 0.60 Sm 0.13 Gd 0.07 Dy 0.03 Er 0.01 Yb 0.01 Y 0.12 Th 0.02 ) ∑4.04 (Al 3.54 Fe 2+ 0.40 Mg 0.02 ) ∑3.96 Si 4.99 O 20 (OH) 2 for alnaperbøeite-(Ce) [IMA 2012-54]. The respective end-member formulas are A (Ce 3 Ca) M (Al 3 Fe 2+ )Si 2 O 7 (SiO 4 ) 3 O(OH) 2 , which requires Ce 2 O 3 45.10, CaO 5.14, FeO...
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Journal Article
Published: 01 January 2019
European Journal of Mineralogy (2019) 31 (1): 173-181.
...) the alnaperbøeite group – includes members typified by the mineral alnaperbøeite-(Ce). This group is derived from gatelite-(Ce) by homovalent substitutions and one coupled heterovalent substitution of the type A 2+ A 3+ A 4 [A 3+ 3 ] + M 3 [M 2+ ] → A 2 +A 3+ A 4 [A 3+ 2.5 A + 0.5 ] + M 3 [M 3+ ]. Alnaperbøeite-(Ce...
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Image
Chemical variations along the perbøeite-(Ce)–<b>alnaperbøeite</b>-(Ce) join. Eleme...
Published: 01 January 2014
Figure 3 Chemical variations along the perbøeite-(Ce)–alnaperbøeite-(Ce) join. Element contents are given in atoms per formula unit (on the basis of Si+P+Al+Ti+Fe+Mg = 9): REE includes Y and Th; Ca includes Ba and Mn; Fe includes Mg. Empty symbols refer to chemical data reported in Table 7; black
Image
Unit-cell content in perbøeite-(Ce)–<b>alnaperbøeite</b>-(Ce).
Published: 01 January 2014
Figure 4 Unit-cell content in perbøeite-(Ce)–alnaperbøeite-(Ce).
Image
Diagram distinguishing groups in the gatelite supergroup, based on  M 1 +  ...
Published: 01 January 2019
Fig. 2 Diagram distinguishing groups in the gatelite supergroup, based on M 1 +  M 3 contents. Västmanlandite and alnaperbøeite are potential groups because both include only a single member, and thus are written in italics.
Image
Variation of the mean electron number derived from the refined site scatter...
Published: 01 January 2014
Figure 5 Variation of the mean electron number derived from the refined site scattering in each A site vs. their sum in the untreated crystals of the perbøeite-(Ce) and alnaperbøeite-(Ce) series. The monotonous decrease observed for A2, A3, and A4 as a function of the alnaperbøeitic component can
Journal Article
Published: 01 April 2014
American Mineralogist (2014) 99 (4): 876.
... © 2014 Mineralogical Society of America 2014 Perbøeite-(Ce) and alnaperbøeite-(Ce), two new members of the epidote-törnebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member by P. Bonazzi, G.O. Lepore, L. Bindi, C. Chopin, T...
Image
Variation of Al 3+  vs.  Mg 2+  (in atoms per formula unit) in gatelite-sup...
Published: 01 January 2019
Fig. 5 Variation of Al 3+ vs. Mg 2+ (in atoms per formula unit) in gatelite-supergroup minerals. Empty circles with numbers represent ideal compositions: 1 = gatelite-(Ce); 2 = västmanlandite-(Ce); 3 = ferriperbøeite-(Ce); 4 = perbøeite-(Ce); 5 = alnaperbøeite-(Ce). Orange triangles (TY) refer
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SEM-BSE images showing minute lamellae of törnebohmite-(Ce) (light grey, bl...
Published: 01 January 2019
Fig. 4 SEM-BSE images showing minute lamellae of törnebohmite-(Ce) (light grey, black arrow) intergrown with lamellae of a member of the perbøeite-(Ce)–alnaperbøeite-(Ce) solid solution (dark grey, red arrow) in the samples from Stetind (Tysfjord, Norway). Intermediate grey lamellae likely
Image
The  ab sinβ value plotted against the  c  unit-cell parameter for ST2_02 c...
Published: 01 January 2014
determination, it is not easy to establish whether the spread of values observed for the untreated crystals is only due to the variation of the alnaperbøeite-(Ce) component or whether a modest hydrogen deficiency also occurs.
Journal Article
Published: 01 May 2018
European Journal of Mineralogy (2018) 30 (3): 537-544.
... gatelite-(Ce) ( Bonazzi et al. , 2003 ), västmanlandite-(Ce) ( Holtstam et al. , 2005 ), perbøeite-(Ce) and alnaperbøeite-(Ce) ( Bonazzi et al. , 2014 ). While the T module exhibits an almost invariable composition, the variable composition of the E module differentiates each member. In particular...
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Journal Article
Published: 20 December 2017
European Journal of Mineralogy (2017) 29 (6): 1083-1087.
... Newsletter No. 40, December 2017, page 1085; European Journal of Mineralogy , 29 , 1083–1087. A new classification and nomenclature scheme has been approved for the minerals of the gatelite supergroup. The supergroup is dived into three groups: gatelite group, västmanlandite group, alnaperbøeite group...
Journal Article
Published: 01 December 2017
Mineralogical Magazine (2017) 81 (6): 1577-1581.
... Magazine , 81 , 1577–1581. Gatelite supergroup A new classification and nomenclature scheme has been approved for the minerals of the gatelite supergroup. The supergroup is divided into three groups: gatelite group, västmanlandite group, alnaperbøeite group. Schoonerite group...