1-20 OF 80 RESULTS FOR

ralstonite

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 January 2017
The Canadian Mineralogist (2017) 55 (1): 115–120.
...Daniel Atencio; Marcelo B. Andrade; Artur C. Bastos Neto; Vitor P. Pereira Abstract Ralstonite is renamed hydrokenoralstonite, ideally □ 2 Al 2 F 6 (H 2 O). “Atroarite” and the “AHF” phase (hydrated aluminum hydroxy-fluoride, a “ralstonite-like mineral”) are also hydrokenoralstonite. The name...
FIGURES
Journal Article
Published: 01 April 2008
The Canadian Mineralogist (2008) 46 (2): 541–542.
... . J. Solid State Chem . 77 , 96 – 101 . Rosenberg , P.E. ( 1988 ): Aluminum fluoride hydrates, volcanogenic salts from Mount Erebus, Antarctica . Am. Mineral . 73 , 855 – 860 . Rosenberg , P.E. ( 2006 ): Stability relations of aluminum hydroxy-fluoride hydrate, a ralstonite...
Journal Article
Published: 01 February 2006
The Canadian Mineralogist (2006) 44 (1): 125–134.
... only in dehydrated samples (Crowley & Scott 1948, Grobelny 1977 ). Inasmuch as this peak is invariably absent in AHF synthesized in this study ( Table 1 ), all samples are assumed to be hydrated. Synthetic AHF varies between n = 0.9 and 1.0 ( Grobelny 1977 ); most natural samples of ralstonite...
FIGURES | View All (4)
Journal Article
Published: 01 October 1980
American Mineralogist (1980) 65 (9-10): 1057–1058.
...) hydrothermal alteration that produced a ralstonite-like mineral without significant Na or Mg, which previously have been considered essential components of ralstonite. Copyright © 1980 by the Mineralogical Society of America 1980 ...
Journal Article
Published: 01 August 1976
The Canadian Mineralogist (1976) 14 (3): 391–392.
Journal Article
Published: 01 December 1965
American Mineralogist (1965) 50 (11-12): 1851–1864.
...Hans Pauly Abstract Ralstonite of the following composition Na 0.88 Mg 0.88 Al 1.12 ( F , OH ) 6 H 2 O ( F : OH = 10.9 : 1 ) has been found in the cryolite deposit in Ivigtut, South Greenland. Various cubic minerals of ralstonite type have been registered from this deposit. These and ralstonite...
Journal Article
Published: 01 September 1939
American Mineralogist (1939) 24 (9): 566–576.
...Adolf Pabst Abstract The rare fluoride, ralstonite, is found in small, clear, colorless octahedrons with cryolite and thomsenolite at Ivigtut, Greenland. It has also been reported from Colorado and Japan, but only the Greenland material has been analyzed. The best analyses of ralstonite are those...
Image
CHEMICAL COMPOSITIONS OF SELECTED ROMÉITE, ELSMOREITE, BETAFITE, <span class="search-highlight">RALSTONITE</span>...
Published: 18 January 2024
TABLE 5. CHEMICAL COMPOSITIONS OF SELECTED ROMÉITE, ELSMOREITE, BETAFITE, RALSTONITE, AND COULSELLITE GROUP MINERALS WITH CALCULATIONS AND CLASSIFICATIONS BY WinPclclas
Journal Article
Published: 01 June 1949
American Mineralogist (1949) 34 (5-6): 383–397.
... with a = 7.30, b = 7.05, c 9.97 kX, contains 4[Na 2 MgAlF 7 ]; X=a , Y = b . Cryo-lithionite has a = 12.14 kX. Powder photographs of ralstonite show indications of non-cubic symmetry, and “hagemannite” is an ochre consisting of ralstonite with some thomsenolite and goethite. X -ray powder spacings...
Journal Article
Published: 01 February 2014
Mineralogical Magazine (2014) 78 (1): 215–222.
...′58.9″N 20°14′50.3″W). It occurs as sub-micron-sized crystals forming a white powder in association with anhydrite, bassanite, gypsum, jarosite, anatase, hematite, opal, ralstonite, jakobssonite and meniaylovite. Chemical analyses by energy-dispersive spectrometry with a scanning electron-microscope...
FIGURES
Journal Article
Published: 01 January 2007
American Mineralogist (2007) 92 (1): 34–43.
..., and ralstonite combined with theoretical modeling have given accurate values of chemical shift (δ iso ), and quadrupolar interaction parameters ( C q and η), thereby eliminating ambiguities incurred by the complex nuclear interactions. These NMR data have been correlated with local electronic environments...
FIGURES | View All (8)
Image
SEM photomicrograph of gjerdingenite-Fe. Length of the aggregate is ~0.5 mm...
Published: 01 December 2002
F ig . 1. SEM photomicrograph of gjerdingenite-Fe. Length of the aggregate is ~0.5 mm. The mineral is dusted with tiny crystals of two phases. At high magnification, one of them is seen to form cubes and is probably ralstonite.
Journal Article
Published: 18 January 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (1): 165–185.
...TABLE 5. CHEMICAL COMPOSITIONS OF SELECTED ROMÉITE, ELSMOREITE, BETAFITE, RALSTONITE, AND COULSELLITE GROUP MINERALS WITH CALCULATIONS AND CLASSIFICATIONS BY WinPclclas ...
FIGURES
Image
X-ray powder-diffraction pattern of a mixture of jakobssonite and <span class="search-highlight">ralstonit</span>...
Published: 01 June 2012
F ig . 4. X-ray powder-diffraction pattern of a mixture of jakobssonite and ralstonite from the cotype specimen, NI 15511, from Hekla volcano. The observed (blue) and calculated (red) curves are shown together with a difference curve (grey) and the theoretical jakobssonite pattern calculated
Journal Article
Published: 01 December 2015
European Journal of Mineralogy (2015) 27 (6): 805–812.
.... It is associated with gypsum, ralstonite and opal; earlier, primary minerals of the assemblage are sellaite, fluorite, halite, anhydrite, cotunnite, sofiite, flinteite, chubarovite, anglesite, challacolloite, zincomenite, saltonseaite, hollandite, hematite, jakobssonite, leonardsenite and olsacherite...
FIGURES | View All (4)
Journal Article
Published: 01 June 2014
European Journal of Mineralogy (2014) 26 (3): 439–449.
... volcano eruption (1975–1976), Kamchatka Peninsula, Russia. The mineral occurs as aggregates of red needle-like crystals up to 0.4 mm in maximal dimension, elongated along [001]. Associated minerals are chloromenite, prewittite, melanothallite, sophiite, ralstonite, ponomarevite, and native gold...
FIGURES | View All (6)
Journal Article
Published: 01 June 2012
Mineralogical Magazine (2012) 76 (3): 751–760.
...F ig . 4. X-ray powder-diffraction pattern of a mixture of jakobssonite and ralstonite from the cotype specimen, NI 15511, from Hekla volcano. The observed (blue) and calculated (red) curves are shown together with a difference curve (grey) and the theoretical jakobssonite pattern calculated...
FIGURES | View All (6)
Journal Article
Published: 01 February 2010
Mineralogical Magazine (2010) 74 (1): 147–157.
... crystals intimately associated with malladrite, hieratite and ralstonite. The mineral is colourless, transparent, non-fluorescent, has a vitreous lustre and a white streak. The calculated density is 2.69 g cm −3 . An SEM-EDS quantitative chemical analysis shows the following range of concentrations (wt...
FIGURES | View All (8)
Journal Article
Published: 01 February 2009
Mineralogical Magazine (2009) 73 (1): 51–57.
...T. Balić-Žunić; A. Garavelli; P. Acquafredda; E. Leonardsen; S. P. Jakobsson Abstract A new mineral, eldfellite, was found among fumarolic encrustations collected in 1990 on the Eldfell volcano, Heimaey Island, Iceland. Associated minerals are ralstonite, anhydrite, gypsum, bassanite, hematite...
FIGURES
Journal Article
Published: 01 October 1991
American Mineralogist (1991) 76 (9-10): 1662–1673.
.... Mineral phases introduced in the alteration assemblages include alunite reflecting high SO 3 , activity, hydrated aluminum hydroxy-fluoride (a ralstonite-like phase) and fluorite reflecting high F activity, smectite, magnetite, hematite, and goethite reflecting oxidation and hydration reactions. Opal...