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Mineralogical ClassificationNew species approved (and nullified) by CNMMN
1st Jul 2005 12:15 UTCMarco E. Ciriotti
IMA No. 2005-012a
Fabi quarry, near Lanzada, Valmalenco, Sondrio, Lombardy, Italy
Francesco Demartin
NaBa3CaY(CO3)3(OH)6·3H2O
Donnayite group
Triclinic: P1; structure determined
IMA No. 2005-013
Helikon II pegmatite, Karibib, Namibia
Paul Keller
(Mn2+,Mn3+,Fe3+)2(PO4)O
Triplite/triploidite groups
Monoclinic: I2/a; structure determined
IMA No. 2005-014
Bayun Obo iron mine, Inner Mongolia, China
Xu Jinsha
(Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe3+)2Ti2Si4O22
Chevkinite group
Monoclinic: P21/a (pseudo-C2/m); structure determined
IMA No. 2005-015a
Zhelezny mine, Kovdor carbonatite massif, Kola Peninsula, Russia
Sergey V. Britvin
Layered double hydroxide
Trigonal: P 3, P3, P 31m, P31m, P312, P321, P 3m1, P3m1
IMA No. 2005-016
Carrière de la Flèche, near Bertrix, Ardennes, Belgium
Frédéric Hatert
Ca2(Al,Fe2+,Mg)Al2(SiO4)(Si2O7)(OH,O)2·H2O
Pumpellyite group
Monoclinic: A2/m; structure determined
NOMENCLATURE MODIFICATION
IMA No. 05-B
The name of the mineral noélbensonite has been modified in noelbensonite.
NULLIFIED CNMMN DECISION
Proposal 2004-051, hydrous alumina, was approved by the CNMMN (see publications ‘Minerals approved in 2004). Several CNMMN members had asked, however, for a reexamination of akdalaite (69-002) which was approved as the first natural hydrous alumina. The authors of 2004-051 obtained holotype material of akdalaite from the Fersman museum in Moscow, and the re-examination showed that akdalaite and the material for 2004-051 are identical. The previously refined unit cell of akdalaite is incorrect, so that akdalaite and 2004-051 are actually the same mineral species. The name ‘akdalaite’ has priority; the fact that akdalaite was given a wrong space group does not necessitate a formal redefinition of this mineral. The re-examination and 2004-051 should be published as “New data and a new occurrence of akdalaite”. The approval decision of the CNMMN on 2004-051 is consequently nullified.
More at the web page of CNMMN: http://www.geo.vu.nl/users/ima-cnmmn/minerals2005.pdf
1st Jul 2005 15:14 UTCMarco E. Ciriotti
The name and nomenclature was previously approved by CNMMN (Passaglia & Gottardi, 1973).
Ref:
• Passaglia E. & Gottardi G. (1973): Crystal chemistry and nomenclature of pumpellyites and julgoldites. Canadian Mineralogist, 12, 219-223.
• Yoshiasa, A. & Matsumoto, T. (1985): Crystal structure refinement and crystalchemistry of pumpellyite. American Mineralogist, 70, 1011-1019.
1st Jul 2005 15:47 UTCJim Ferraiolo
I noticed that as well.
Also:
IMA 2005-013 appears to be the manganese-manganese analog of stanekite Mn2+Fe3+(PO4)O
if the composition is written to balance:
Mn2+Mn3+(PO4)O
If I recall Paul Keller was first author on stanekite.
1st Jul 2005 20:29 UTCMarco E. Ciriotti
Ciao.
1st Jul 2005 20:42 UTCMarco E. Ciriotti
2nd Jul 2005 17:35 UTCMarco E. Ciriotti
27th Jul 2005 07:57 UTCyqp
23rd Sep 2005 01:56 UTCJeffrey
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