Name Pumpellyite Al RRUFF ID R070131 Ideal Chemistry Ca 2 Al 3 Si 2 O 7 SiO 4 OH O 2 ·H 2 O Locality La Flèche Quarry Bertrix Luxembourg Province Belgium Source Michael Scott S100425 Owner RRUFF Description Pale green radiating fibrous to bladed crystals Status The identification of this mineral has been confirmed only by single crystal X ray diffraction
Name The suffix indicates a member of the pumpellyite group with aluminum dominant in the M1 and M2 sites Honors Raphael Pumpelly 1837 1923 pioneer student of the paragenesis of copper deposit minerals of the Keweenaw Peninsula Michigan USA Type Material Laboratory of Mineralogy University of Liège Belgium 20327
Pumpellyite pronounced puhm PELL ee eyet is the name of a group of minerals or one of the minerals in that most well known pumpellyite variety is called chlorastrolite which is also the Michigan state gemstone The mineral forms are fairly common though some pumpellyite varieties are rarer than others
La pumpellyite se trouve dans des cavits amygdaloïdes et en remplissage de fissures dans des roches basaltiques et gabbroiques dans des terranes mtamorphiques Il s agit d un minral indicateur des faciès mtamorphiques prehnite pumpellyite Elle est associe aux chlorites l pidote au quartz la calcite et la prehnite
Pumpellyite is characterized by iron rich composition wt% as total iron as FeO and its range almost overlaps with those in prehnite pumpellyite facies metabasites of Ishizuka 1991 These facts suggest that the metabasites of the Tobiishi sub unit suffered the prehnite pumpellyite facies metamorphism instead of the greenschist facies
Volume 2 David J Waters in Encyclopedia of Geology Second Edition 2021 Low Temperature Metamorphism Mineral assemblages of the zeolite and prehnite pumpellyite facies are most likely to be found in graywackes that contain reactive volcanic lithic material in addition to albite and quartz In low temperature high pressure metamorphism similar clastic sedimentary rocks may
La pumpellyite è un nesosilicato contenente gruppi tetraedrici indipendenti SiO 4 e unit Si 2 O 7 6 uniti tra loro da catene ottaedriche contenenti ioni metallici La pumpellyite è chimicamente e strutturalmente legata al gruppo degli epidoti E un minerale comune in rocce mafiche alterate ed assieme alla phrenite definisce la facies
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General Pumpellyite Fe Information Chemical Formula Ca2Fe Al2 SiO4 Si2O7 OH O 2• H2O Composition Molecular Weight = gm Calcium % Ca % CaO Aluminum % Al % Al 2 O 3 Iron % Fe % Fe 2 O 3 Silicon %
El trmino se corresponde con cinco minerales antes considerados variedades y hoy aceptados por la Asociación Mineralógica Internacional como cinco especies distintas Pumpellyíta Al [2] Ca 2 Al 3 SiO 4 Si 2 O 7 OH O 2 ·H 2 O Pumpellyíta Fe2 [3] Ca 2 Fe 2 Al 2 SiO 4 Si 2 O 7 OH 2 ·H 2 O Pumpellyíta Fe3 [3] Ca 2 Fe 3 Mg Al 2 SiO 4 Si
General Pumpellyite Fe Information Chemical Formula Ca2Fe Al Fe 2 SiO4 Si2O7 OH 2• H2O Composition Molecular Weight = gm Calcium % Ca % CaO Aluminum % Al % Al 2 O 3 Iron % Fe % FeO Silicon % Si
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Named for its relationship to the members of the pumpellyite group The suffix was added in 1973 during a redefinition of the species Raphael Pumpelly [September 8 1837 Owego New York USA August 10 1923 Newport Rhode Island USA] was an active mining consultant and was professor of Mining Science at Harvard University
cabochon de pumpellyite pumpellyite Fiche dtaille pumpellyite silicates Minral rare dcouvert dans la Carrière de la Flèche Bertrix dans les Ardennes en Belgique Il faut parler des « pumpellyites » car il y en a où c est le magnsium qui domine dans d autres c est l aluminium et encore dans d autres c est le
148 R K SPRINGER H W DAY & R E BEIERSDORFER prior to the late Jurassic Nevadan deformation because noticeable contrasts in metamorphic grade occur across major steep faults in the region
Pumpellyite Al a new mineral from Bertrix Belgian Ardennes FRED´ ERIC´ HATERT1 MARCO PASERO 2 NATALE PERCHIAZZI2 and THOMAS THEYE3 1 LaboratoiredeMin´eralogie D´epartement de G´eologie Bˆatiment B18 Universit´edeLi ege 4000 Li ege Belgium Corresponding author e mail fhatert 2 Dipartimento di Scienze
Artioli G Geiger C A 1994 The crystal chemistry of pumpellyite An X ray Rietveld refinement and 57Fe Mossbauer study Physics and Chemistry of Minerals 20 443 453 1994 Keweenawan Michigan 0 293 0009365 Pumpellyite Mg Galli E Alberti A 1969 On the crystal structure of pumpellyite Acta Crystallographica B25 2276 2281 1969 0 293
After deposition these laterally extensive BIF have all experienced minor folding and basinal uplift along with low grade regional metamorphism from burial prehnite pumpellyite facies to greenschist facies General consensus exists regarding the depositional model of
PUMPELLYÍTA Pumpellyite Mg Categoria Minerais Classe Silicatos Grupo Sorossilicato Subgrupo Grupo da Pumpellyíta Fórmula Ca 2 MgAl 2 SiO 4 Si 2 O 7 OH 2 O Sistema Monoclínico Classe cristalográfica Prismática Prismatic Hábito Ocorre como pequenas fibras e placas estreitas e esverdeadas Forma agrupamentos
Pumpellyite crystallizes in the monoclinic prismatic crystal typically occurs as blue green to olive green fibrous to lamellar masses It is translucent and glassy with a Mohs hardness of and a specific gravity of I has refractive indices of nα= nβ= and nγ= Pumpellyite occurs as amygdaloidal and fracture fillings in basaltic and
After deposition these laterally extensive BIF have all experienced minor folding and basinal uplift along with low grade regional metamorphism from burial prehnite pumpellyite facies to greenschist facies General consensus exists regarding the depositional model of
