• Julgoldite - Wikipedia

    en.wikipedia.org/wiki/Julgoldite Julgoldite is a member of the pumpellyite mineral series, a series of minerals characterized by the chemical bonding of silica tetrahedra with alkali and transition metal cations. Julgoldites, along with more common minerals like epidote and vesuvianite, belong to the subclass of sorosilicates, the rock-forming minerals that contain SiO 4 tetrahedra that share a common oxygen to form Si 2 O 7 ...
  • Julgoldite-(Fe+++) Mineral Data

    webmineral.com/data/Julgoldite-(Fe+++).shtml General Julgoldite-(Fe+++) Information : Chemical Formula: Ca2Fe+++(Fe+++,Al)2(SiO4)(Si2O7)(O,OH)2•(H2O) Composition: Molecular Weight = 2,199.83 gm Calcium 14.57 % Ca 20.39 % CaO Magnesium 0.22 % Mg 0.37 % MgO Aluminum 1.35 % Al 2.55 % Al 2 O 3 Iron 27.16 % Fe ...
  • Julgoldite-(Fe++) Mineral Data

    webmineral.com/data/Julgoldite-(Fe++).shtml McDougall Minerals Google Search for Julgoldite-(Fe ) Mineral News Website Link Rock and Mineral Shows Google Search for Julgoldite-(Fe ) Weinrich Minerals, Inc. Google Search for Julgoldite-(Fe ) Ask about Julgoldite-(Fe++) here : Ask-A-Mineralogist from the Mineralogical Society of America
  • Julgoldite-(Fe2+) : ClassicGems.net

    classicgems.net/gem_julgoldite.htm Julgoldite-(Fe 2+) is a sorosilicate mineral and a member of the Pumpellyite Group of minerals that also includes Pumpellyite-(Mg), also called Chlorastrolite. Julgoldite crystals are typically deep black, flat, prismatic to bladed, to 2 mm, often in fan-shaped, plumose crystal groups with nearly submetallic luster.
  • Julgoldite-(Fe3+): Mineral information, data and localities.

    www.mindat.org/min-7125.html Julgoldite-(Fe3+) Artioli G, Geiger C A, Dapiaggi M (2003) The crystal chemistry of julgoldite-Fe3+ from Bombay, India, studied using synchrotron X-ray powder diffraction and 57Fe Mossbauer spectroscopy American Mineralogist 88 1084-1090
  • Julgoldite-(Fe2+) - Mindat.org

    www.mindat.org/gm/2120 Julgoldite-(Fe) with Fluorapophyllite from Jalgaon, Maharashtra The rare mineral Julgodite-(Fe) covers the basalt matrix. The small crystals, which are quite dark, are noticeable as they contrast well with the crystals of Fluorapophyllite, which are doubly-terminated, brilliant, water clear and with sharp pyramids. Size:20 x 13 x 5 cm
  • Julgoldite-(Fe ) - RRUFF Database: Raman, X-ray, Infrared ...

    rruff.info/Julgoldite-(Fe+++) NAMES RRUFF ID IDEAL CHEMISTRY SOURCE LOCALITY OPTIONS; Julgoldite-(Fe 2+): R070725: Ca 2 Fe 2+ Fe 3+ 2 (Si 2 O 7)(SiO 4)(OH) 2 ·H 2 O: Michael Scott S104176: Khandivali Quarry (Kandivali Quarry), Mumbai District (Bombay District), Maharashtra, India
  • Julgoldite-(Fe2+) Ca Fe2+(Fe3+ Al) (SiO )(Si O )(OH) H O 2 ...

    www.handbookofmineralogy.org/pdfs/julgoldite-(Fe2+).pdf Julgoldite-(Fe2+) Ca2Fe2+(Fe3+;Al)2(SiO4)(Si2O7)(OH)2² H2O °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: 2=m: Crystals °at prismatic to bladed, to 2 mm, elongated along [010] and °attened k f100g.
  • Crystal chemistry of julgoldite, a mineral series of the ...

    pubs.geoscienceworld.org/.../crystal-chemistry-of-julgoldite-a-mineral-series Single-crystal X-ray crystal-structure refinements and electron-microprobe analyses of two julgoldite samples, in one case complemented by Mössbauer spectroscopy to determine the Fe valence distribution, yielded the compositions Ca 2.00 X (Fe 2+ 0.44 Fe 3+ 0.29 Mg 0.17 Al 0.10) Y (Fe 3+ 0.82 Al 0.18) 2 Si 3 O 10.39 (OH) 3.61 (Bombay) and Ca 2.00 X (Fe 0.67 Mg 0.16 Al 0.17) Y (Fe 3+ 0.81 Al 0 ...
  • Julgoldite, the Fe+2−Fe+3 dominant pumpellyite: A new ...

    www.sciencedirect.com/science/article/pii/0024493771901010 Julgoldite, (Ca, Mn) 2 (Fe +2,Fe +3,Mg) (Fe +3, Al) 2 (SiO 4)(Si 2 O 7) (OH) 2 (H 2 O), is the Fe +2 −Fe +3 member of the pumpellyite group occuring as a new fissure mineral from the ‘Amerika’ stope, Långban, Sweden. It occurs as black bladed crystals, H =4 1 2, cleavage a {100} good, streak and powder greenish-olive with a bluish tinge. The structure cell data indicate an isomorphous ...