 | | Journal (article/letter/editorial) | | and andremeyerite-bearing nephelinite from Nyiragongo volcano, East African Rift Tom Andersen a,⁎, Marlina...peralkaline leucite nephelinite from the active volcano Nyiragongo in the Virunga province of the East African...mineral. Low-variance mineral assemblages in Nyiragongo nephelinite define a cooling trend from eruptive...East African Rift (Shombole, Oldoinyo Lengai, Nyiragongo). A number of rare minerals that are characteristic...described from leucite- and melilite-bearing nephelinite from Nyiragongo in the Virunga volcanic province |  | | Journal (volume) | | .............. Th. G. SAHAMA, Iron Content of Melilite ........................................... 3... Dietrich about ten years ago when Dr. William F. Foshag and Dr. George Switzer were kindly helping...locality ptygmatic features, was sent to the museum by Dr. J. J. Sederholm. The only location given was »southern...Bl'acksburg, Virginia, U.S. A . 1believe that most of Dr. Marmo's points are covered sufficiently in the original...described specimen was not, in my opinion, sent by Dr. Sederholrn to illustrate ptygmatic features. The |  | | Journal (volume) | | .............. Th. G. SAHAMA, Iron Content of Melilite ........................................... 3... Dietrich about ten years ago when Dr. William F. Foshag and Dr. George Switzer were kindly helping...locality ptygmatic features, was sent to the museum by Dr. J. J. Sederholm. The only location given was »southern...Bl'acksburg, Virginia, U.S. A . 1believe that most of Dr. Marmo's points are covered sufficiently in the original...described specimen was not, in my opinion, sent by Dr. Sederholrn to illustrate ptygmatic features. The |  | | Book (edition) | | co-author, teacher, mentor, colleague and friend, Dr. Joseph A. Mandarino. -Malcolm E. Back Fleischer's...they are: Dr. Peter Bayliss, Dr. Ernst A.J. Burke, Dr. Anton and hakhmouradian,Robert Gault, Dr. Julian...Låszl6 Horvåth, Dr. Uwe Kolitsch, Locock,Gaspare Malet.to,Dr. Roger Mitchell, Renato Pagano. Dr. Ole Petersen...Robert Ramik,Andy Roberts, hallit, Dr. Chris Stanley,Tony Steede and Dr. ThomasWitzke. upport and encouragementof...Minerals that are listed as belonging to the same group are similarly closely comparable in composition |  | | Book (edition) | | This book is respectfully dedicated to the memory of Dr. John Sinkankas for his kind initiative and support...to the chemical formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest...chemical formula, structure (crystal system, space group, and unit cell dimensions), and at least some other...site occupancy. The Sb members of the tennantite group (2.G) will serve as a good example: tetrahedrite...registered in this book (e.g. in the amphibole group). For more detailed information see "Dana's System |  | | Book (edition) | | extensively rewritten by the book’s distinguished group of authors in the light of new research and important...all varietal names, synonyms, spelling variants, group names, and so forth; only names in contemporary...contemporary use have been included. Most of the mineral group lists presented were taken from the Glossary of Mineral...letters pointing out that for some entries our space group, Z, and lattice constants are mutually exclusive...trigonal. Class: Classes are designated by their point group symmetry. Note that as mineralogists we use the | | | Book (edition) | | extensively rewritten by the book's distinguished group of authors in the light of new research and important...all varietal names, synonyms, spelling variants, group names, and so forth; only names in contemporary...contemporary use have been included. Most of the mineral group lists presented were taken from the Glossa,y of Mineral...letters pointing out that for some entries our space group, Z, and lattice constants are mutually exclusive...trigonal. Class: Classes are designated by their point group symmetry. Note that as mineralogists we use the |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | 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...internally contradictory. 5A. Groups The term group refers to an aggregate or multiple (usually three...identical or closely similar structure and chemistry. A group may be named when there are several end members |  | | Book (edition) | | attempt a complete description of a small mineral group to uncover the unsatisfactory state of our present...well render the volume difficult to use by a large group of potential readers not familiar with structural/chemical...with the inherent problems of end-member names vs. group names and related aspects of nomenclature. Rather...spelling variants, descriptive names, mixtures, group names, chemical names, etc., found in the literature...letters pointing out that for some entries our space group , Z, and lattice constants are mutually exclusive |
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