• Pumpellyite - Wikipedia

    en.wikipedia.org/wiki/Pumpellyite pumpellyite-(Al): Ca 2 (Al,Fe 2+,Mg)Al 2 [(OH,O) 2 |SiO 4 |Si 2 O 7]·H 2 O; Pumpellyite crystallizes in the monoclinic-prismatic crystal system. It typically occurs as blue-green to olive green fibrous to lamellar masses. It is translucent and glassy with a Mohs hardness of 5.5 and a specific gravity of 3.2.
  • Pumpellyite-(Al) Mineral Data

    webmineral.com/data/Pumpellyite-(Al).shtml Pumpellyite-(Al) Crystallography: Axial Ratios: a:b:c =1.495:1:3.2427 : Cell Dimensions: a = 8.818, b = 5.898, c = 19.126, Z = 4; beta = 97.26° V = 986.74 Den(Calc ...
  • Pumpellyite: The mineral pumpellyite information and picture

    www.minerals.net/mineral/pumpellyite.aspx The rare Pumpellyite-(Al) comes from the La Flèche Quarry, Bertrix, Belgium. In the U.S., the most notable region for this mineral is the Keweenaw Peninsula in Keweenaw Co., Michigan, which is also the type locality.
  • Pumpellyite-(Al) - RRUFF Database: Raman, X-ray, Infrared ...

    rruff.info/Pumpellyite-(Al) 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.
  • Pumpellyite - an overview | ScienceDirect Topics

    www.sciencedirect.com/topics/earth-and-planetary-sciences/pumpellyite By relation to leading minerals among manganese ores, Brusnitsyn et al. (2009) have identified several varieties connected by gradual transitions (in the names of the rocks the minerals are listed in sequence by increasing measure in content in total %): rhodochrosite-caryopilite-tephroite, pumpellyite-piemontite-andradite-caryopilite, hematite ...
  • Pumpellyite-(Al), a new mineral from Bertrix, Belgian ...

    orbi.uliege.be/handle/2268/7851 Pumpellyite-(Al) belongs to the pumpellyite group, and corresponds to the Al-rich compositions where the M1 and M2 sites contain Al as predominant cation. The crystal structure of pumpellyite-(Al) has been refined by the Rietveld method, based on an X-ray powder diffraction pattern, to R-Bragg = 7.09 %.
  • ALEX STREKEISEN-pumpellyite-

    www.alexstrekeisen.it/english/meta/prehnite.php Pumpellyite - Ca 2 Al 2 (Al,Fe 3+ Fe 2+ Mg)1.0[Si 2 (O, OH) 7>][SiO 4](OH, O) 3 Named in 1925 by Charles Palache and Helen E. Vassar in honor of US geologist, Raphael Pumpelly. Pumpellyite is a nesosilicate containing both independent SiO4- tetrahedral and Si 2 O 7 6-units cross-linking octahedral chains occupied by metals. Pumpellyite, is chemically and structurally related to Epidote group ...
  • Pumpellyite-(Al), a new mineral from Bertrix, Belgian Ardennes

    rruff-2.geo.arizona.edu/uploads/EJM19_247.pdf 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@ulg.ac.be 2 Dipartimento di Scienze della Terra, Universit`a degli Studi di Pisa, Via S. Maria 53 ...
  • Pumpellyite-(Al), a new mineral from Bertrix, Belgian ...

    core.ac.uk/display/13474695 Pumpellyite-(Al), ideally Ca-2(Al,Fe2+,Mg)Al-2(SiO4)(Si2O7)(OH,O)(2)center dot H2O, is a newly approved mineral species from Bertrix, Ardennes mountains, Belgium. It occurs as radiating fibrous aggregates reaching 5 mm in diameter, constituted by acicular crystals associated with calcite, K-feldspar and chlorite.
  • Pumpellyite-(Mg): Mineral information, data and localities.

    www.mindat.org/min-3309.html Ca 2 Al 2 Si 3 O 10 (OH) 2: 5 photos of Pumpellyite-(Mg) associated with Rock Crystal: SiO 2: 4 photos of Pumpellyite-(Mg) associated with Laumontite: CaAl 2 Si 4 O 12 · 4H 2 O: 4 photos of Pumpellyite-(Mg) associated with Calcite: CaCO 3: 3 photos of Pumpellyite-(Mg) associated with Clinozoisite-Epidote Series: 3 photos of Pumpellyite-(Mg ...