 | | Report (issue) | | Crystal Data: Hexagonal. Point Group: 3. In bundles of slender acicular to threadlike crystals. Twinning:...5587(6) Z = 54 X-ray Powder Pattern: Vesuvius, Italy. 3.09 (100), 2.593 (30), 2.131 (25), 4.26 (15),...78 Total 100.04 100.41 100.00 (1) Monte Somma, Italy. (2) Do.; by electron microprobe. (3) KAlSiO4. Polymorphism...Polymorphous with kalsilite, panunzite, and trikalsilite. Occurrence: In blocks of biotite-pyroxenite...(Monte Somma, Italy); clinopyroxene, garnet, leucite, haüyne, latiumite (Albano, Italy). Distribution: |  | | Journal (article/letter/editorial) | | geochemical study of granular xenoliths from the Alban Hills volcano, Central Italy: bearing on evolutionary...Scienzedella Terra, University"La Sapienza", Roma, Italy 2 Istituto di Scienzedella Terra, Universityof Messina...Messina, C.P. 54, 98166 Messina-S. Agata, Italy 3 Department or Geology,Universityof Western Ontario...deposits emplaced during the latest stages of activity of the Alban Hills volcano range from ultramafic...ultramafic to salic. Ultramafic types consist of various proportions of olivine, spinel, clinopyroxene and phlogopite |  | | Journal (article/letter/editorial) | | ultrapotassic and carbonate-rich volcanic rocks in central Italy: petrogenetic and geodynamic implications Angelo...della Terra, Piazza UniÕersita, ` 06100 Perugia, Italy Received 4 December 1997; accepted 1 May 1998 Abstract...intra-Apennine volcanic ŽIAV. centres occurring east of the potassium-rich Roman comagmatic province show...8–20, whereas the rocks from the southern center of Mt. Vulture are still strongly undersaturated in...the IAV centers. Kamafugites have high abundances of LILE and high LILErHFSE ratios, and their incompatible |  | | Journal (article/letter/editorial) | | chemistry and petrogenesis of granular ejecta from the Alban Hills volcano (Central Italy) M. Federico1 and A...Sapienza'', Roma, Italy Dipartimento di Scienze della Terra, Universita di Perugia, Perugia, Italy With 8 Figures...Summary A suite of lithics (ejecta) collected from the latest erupted pyroclastic products of the Alban Hills...Hills volcano (Central Italy) has been studied to determine their mineralogical composition and to investigate...ejecta commonly have granular texture and consist of coarse-grained crystals often associated with a ®ne- |  | | Journal (article/letter/editorial) | | etransitions in kalsilite Mrcnnnr. A. CnnpnNTER AND DlNrnr,l CsLr,Ar Department of Earth Sciences,University...University of Cambridge, Downing Street,Cambridge CB2 3EQ, U.K. Ansrru.cr A diversity of twinning and...natural kalsilite from volcanic and metamorphic rocks (Mount Nyiragongo, Z,aire; Alban Hills, Italy; Kerala...er and singlecrystal X-ray diffraction. Pure kalsilite has P6rmc symmetry at high temptiratures but transformsto...coexists with a structure that has a sixfold repeat of its a unit-cell dimension. For -Ksrr, the high-temperature |  | | Book | | Mineral Museums of Europe Burchard • Bode . Frontcover Upper left: The observatory at Kremsmunster...the landmark of this famous gem town. U Irich Burchard • Rainer Bode Mineral Museums of Europe '...ff/~/? • /"'--:7]'fi ' The mineralogical cabinet of the convent at Kremsmunster, Austria. The . specimens...displayed m baroque furniture. Mineral Museums of Europe Text by Ulrich Burchard Photos by Rainer Bode...Distributor: Mineralogical Record P. 0. Box 1656 Carson City, NV 89702, USA N. Bariand 90/91; British Museum |  | | Book | | IGNEOUS ROCKS: A CLASSIFICATION AND GLOSSARY OF TERMS Decades of field and microscope studies and more recent...overwhelming, array of nomenclature and terminology associated with igneous rocks. Under the auspices of the International...International Union of Geological Sciences (IUGS), a group of petrologists from around the world has laboured...book presents the results of their work and gives a complete classification of igneous rocks based on all...all the recommendations of the IUGS Subcommission on the Systematics of Igneous Rocks. Revised from the |  | | Report (issue) | | paper by Thomas, Kamenetsky and Davidson - example b of Table 2. The yellow color corresponds to 25 wt.%...488 nm excitation Laser line. The image is composed of 750 single points, each 2µm. Behind each point is...cm–1. For the quantification of the water we used the integral intensity of the broad asymmetric H2O-OH...between 3100 and 3750 cm–1. Distribution Copies of Volume 36 and preceding volumes are obtainable from:...from: The Business Manager Mineralogical Association of Canada P.O. Box 78087 Meriline Postal Outlet 1460 |  | | Book | | •i f l JJ 1atYON RALPH Moore's COMPENDIUM of Mineral Discoveries -------~►►--.•.... -~~1----------...Inc. Tucson, Arizona All rights reserved. No part of this work may be copied, digitized, reproduced, or...permission of the Mineralogical Record, Inc. Please respect our copyright; many years of hard work went...condition, provenance, ownership, price or value of any specimens discussed or reported in this work...Luzenac, Ariege. Operated for talc since the beginning of the 20th century, the Trimouns quarry became well |
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Colle Cimino, Marino, Metropolitan City of Rome Capital, Lazio, Italy