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pyralspite

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Journal Article
Published: 01 April 1992
American Mineralogist (1992) 77 (3-4): 399–406.
...Dana T. Griffin; Dorian M. Hatch; William Revell Phillips; Seyfi Kulaksiz Abstract The crystal chemistry of a natural, birefringent garnet of composition (Fe 1.88 Ca 0.75 Mg 0.24 Mn 0.10 ) Σ = 2.97 (Al 1.96 Fe 0.03 Ti 0.01 ) Σ = 2.00 Si 3.01 O 12 (approximately pyralspite 75 -grandite 25...
Journal Article
Published: 01 December 1984
American Mineralogist (1984) 69 (11-12): 1116–1126.
...Roger D. Aines; George R. Rossman Abstract Natural pyralspite garnets have been found to commonly contain a hydrous component, ranging in concentration from 0.02 to 0.25 wt.% as H 2 O. Anhydrous pyralspites of crustal origin are rare. Of forty crustal garnets examined, only two were anhydrous...
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A: Grossularite-<span class="search-highlight">pyralspite</span>-andradite (<span class="search-highlight">pyralspite</span> = pyrope + almandine + spe...
Published: 01 September 2015
Fig. 7 A: Grossularite-pyralspite-andradite (pyralspite = pyrope + almandine + spessartine) ternary diagram for the garnets from the Beiya district compared with major skarn types B: Johannsenite-diopside-hedenbergite ternary diagram showing compositional variations of clinopyroxene from
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A <span class="search-highlight">PYRALSPITE</span> GARNET* AND ALL POSSIBLE ENDMEMBERS
Published: 26 May 2021
TABLE 5. A PYRALSPITE GARNET* AND ALL POSSIBLE ENDMEMBERS
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The <span class="search-highlight">pyralspite</span>-grandite system as first defined by  Winchell and Winchell (...
Published: 01 August 2016
Figure 6 The pyralspite-grandite system as first defined by Winchell and Winchell (1927) , using the data of Boeke (1914) . Garnets represented by open circles and falling between the two garnet groups in this diagram were discussed by Boeke. Several of them, but not all, were considered
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Triangular andradite–grossularite–<span class="search-highlight">pyralspite</span> plots comparing the mole perce...
Published: 01 July 2007
Fig. 10. Triangular andradite–grossularite–pyralspite plots comparing the mole percent composition of garnets from the Heff skarn and other Cu and Fe skarns in British Columbia (data for Cu and Fe skarns compiled from Meinert, 1984 ; Ray and Webster, 1997 ; Ettlinger and Ray, 1989
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( G &#x2F; K  s ) n  vs. ( K  s &#x2F;ρ) n  for <span class="search-highlight">pyralspite</span> and ugrandite, which are n...
Published: 01 October 2001
F igure 6. ( G / K s ) n vs. ( K s /ρ) n for pyralspite and ugrandite, which are normalized values of their end-members. Notice the relative small range of ( G / K s ) n . The trend is evident for both garnet groups in spite of the scattering in the distribution of data. Dashed lines
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Plots of garnet compositional ranges from select samples of the sandstone M...
Published: 01 July 2015
Appendix Figure 6. Plots of garnet compositional ranges from select samples of the sandstone Medicine Pole Hills in terms of pyralspite-grossular-andradite components (left triangle). The compositional ranges of the pyralspite-rich garnets (greater than approximately 70%) are shown in terms
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Composition des trois types de grenats dans le diagramme triangulaire gross...
Published: 01 January 2015
Fig. 11 Composition des trois types de grenats dans le diagramme triangulaire grossulaire, andradite et pyralspite. a: grenats orangés; b: grenats brun-noir; c: grenats vert-noir. Fig. 11. – Composition of the three different garnets in the grossular-andradite-pyralspite diagram. a: orange
Journal Article
Published: 01 August 2016
American Mineralogist (2016) 101 (8): 1735–1749.
...Figure 6 The pyralspite-grandite system as first defined by Winchell and Winchell (1927) , using the data of Boeke (1914) . Garnets represented by open circles and falling between the two garnet groups in this diagram were discussed by Boeke. Several of them, but not all, were considered...
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Poisson’s ratio (σ) vs. density (ρ) for garnets. Note that σ decreases slig...
Published: 01 October 2001
F igure 7. Poisson’s ratio (σ) vs. density (ρ) for garnets. Note that σ decreases slightly with increasing ρ for pyralspite, but increases significantly with increasing ρ for ugrandite. Dashed lines represent the best fit of the data from solid solution garnets. The error ranges shown in end
Journal Article
Published: 01 February 2008
American Mineralogist (2008) 93 (2-3): 360–372.
...Charles A. Geiger Abstract Silicate garnets, general formula E 3 G 2 Si 3 O 12 , form an important class of rock-forming minerals and, in nature, most are solid solutions. Their crystal-chemical and solid-solution properties are sometimes interpreted in terms of the widely used Pyralspite-Ugrandite...
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Journal Article
Published: 01 February 1979
American Mineralogist (1979) 64 (1-2): 15–31.
...) to metarodingite (CaO ≈ 24 weight percent, Na 2 0 < 0.) weight percent). Garnets in this series vary continuously from 84 percent pyralspite, 16 percent ugrandite (in eclogite), to 42 percent pyralspite, 58 percent ugrandite; some highly calcic metarodingites contain garnet with 80 percent ugrandite...
Journal Article
Published: 01 December 1967
Canadian Journal of Earth Sciences (1967) 4 (6): 1039–1047.
... compared to the spectrum of an almandine-pyrope. The conclusion is reached that the Fe 3+ octahedra in andradite and the pyralspite garnets are different. There is no justification, therefore, in giving an almandine-pyrope (that contains Fe 3+ ) an andradite content on the basis of Fe 3+ analyses. The Fe 3...
Journal Article
Published: 01 June 1960
American Mineralogist (1960) 45 (5-6): 701–711.
...A. L. Gentile; Rustum Roy Abstract Several dozen compositions have been reacted “dry” and under high water pressures in order to determine the extent, and explain the reason for, the solubility among the three garnet groups: ugrandite, pyralspite and the rare earth garnets. Ionic radius is shown...
Journal Article
Journal: Economic Geology
Published: 01 August 2023
Economic Geology (2023) 118 (5): 1219–1229.
... and oscillatory zoning. They have 15 to 23% andradite (Ad), 55 to 67% grossularite (Gr), and 16 to 30% pyralspite (Py) (Ad 15-23 Gr 55-67 Py 16-30 ) and contain 0.08 to 306 ppm U with a lower intercept 206 Pb/ 238 U age of 56.0 ± 1.5 Ma. Cassiterite grains from retrograde veinlets are subhedral to anhedral...
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Ternary diagram showing Kasva skarn garnet compositions. Grs = grossular; A...
Published: 30 January 2018
Fig. 3. Ternary diagram showing Kasva skarn garnet compositions. Grs = grossular; Adr = andradite; Pyralspite (pyrope + almandine + spessartine + uvarovite). Numbers correspond to sample numbers in Table 1 . Errors are smaller than the size of the symbols.
Journal Article
Published: 01 October 2001
American Mineralogist (2001) 86 (10): 1209–1218.
...F igure 6. ( G / K s ) n vs. ( K s /ρ) n for pyralspite and ugrandite, which are normalized values of their end-members. Notice the relative small range of ( G / K s ) n . The trend is evident for both garnet groups in spite of the scattering in the distribution of data. Dashed lines...
FIGURES | View All (9)
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Ternary diagrams summarizing garnet and clinopyroxene compositions in the Y...
Published: 01 May 2015
= hedenbergite, jo = johannsenite, pyralspite = (pyrope + almandine + spessartine).
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Ternary diagrams summarizing garnet and clinopyroxene compositions in the B...
Published: 01 June 2013
, Pyralspite = (pyrope + almandine + spessartine), Hd = hedenbergite, Jo = johannsenite.