...—Providence Mountains, D—Nopah and Resting Springs Mountains, E—Goodsprings Quadrangle, F—North Muddy Mountains and Boulder Dam, G—St. George and Beaver Dam mountains, H—Northern Virgin Mountains, I—Grand Canyon, J—Hawthorne and Tonopah quadrangles, K—Mt. Tobin Quadrangle, L—Antler Peak Quadrangle, M—Roberts...

.... The location of the iron-formation samples used in this study are in the Quad Creek (QC) and Hellroaring Plateau (HR) areas. Also labeled are the Slough Creek batholith (SCB), Jardine Metasedimentary Sequence (JMS), and Yellowstone River shear zone (SZ). White areas indicate Phanerozoic cover. The location...

... Pb ages of about 84 Ma), and trace-elemental patterns of the zircon suggest that the protolith of the jadeitite is an acidic igneous rocks ( Mori et al ., 2011 ). Jadeite (Jd), aegirine (Ae), and Ca–Mg–Fe pyroxenes (Quad) end-member contents of sodic pyroxenes were calculated by the method...

... omphacitite ( Nishiyama, 1989 ), jadeite and omphacite in the Mie jadeitite (Shigeno, unpublished data), jadeite with omphacite inclusions in the Tone jadeitite (Shigeno, unpublished data), omphacite in the Nishikashiyama metagabbro ( Nishiyama, 1989 ). Abbreviations: Jd, jadeite; Ae, aegirine; Quad, Ca–Mg...

...), is the only mineral among those of the olivenite group (see Gaines et al ., 1997 for the new Dana classification) showing a P 2 1 / n crystal structure at room temperature, although characterized by a monoclinic angle close to 90° (Toman, 1977 ; Burns and Hawthorne, 1995 ; Li et al ., 2008 ). All...

... . Details of the data collection and refinement are given in Table 4 . The refined coordinates, equivalent isotropic displacement parameters and bond valence sum (BVS) values (Gagné and Hawthorne, 2015 ) are reported in Table 5 . For the M 1 sites, the BVS values were calculated based on the site...

... I_A = {-}A \times \sum {_{{i} = 1}^{k} } \,{p}_i^a \,{\rm lo}{\rm g}_2p_i^a \quad( {\rm bits/cell}) $$ where 11 $$p_i^a = a_i/A$$ The I A and I A,total parameters are identified by Hornfeck ( 2020 ) as coordinational complexity. The configurational complexity I GA can...

..., based on statistical analyses. Hawthorn Formation .—The lithology of this formation changes greatly. In Florida and South Carolina it consists largely of phosphatic limestone and olive clay and gravel. In many updip locations, especially in Georgia, the Hawthorn consists of sandy clay and gravel...

... minerals which exhibit a wide range of chemical composition. They occur with orthorhombic and monoclinic symmetry and can accommodate cations of formal charge ranging from +1 to +4 and cationic radii from 0.25 to 1.61 Å ( Hawthorne, 1982 , 1983 ) into their general formula A 0–1 B 2 C 5 T 8 O 22 (OH,F,C1...

.... $$\eqalign{&X = {\rm N}{\rm a}^ +, {\rm K}^ +, \,{\rm C}{\rm a}^{2 +}, \,{\rm P}{\rm b}^{2 +}, \squ\; \left( {{\rm vacancy}} \right); \cr & {Y}= {\rm F}{\rm e}^{2 +}, {\rm M}{\rm g}^{2 +}, {\rm M}{\rm n}^{2 +}, {\rm A}{\rm l}^{3 +}, {\rm L}{\rm i}^ +, {\rm F}{\rm e}^{3 +}, \cr & \quad \quad...

... Quad. elon. (λ) 1.009 Angle vari. (σ ) 27.361 V(Å 3 ) 11.004 V2-05a 1.909(3) V2-04 1.940(3) V2-02 2.032(3) V2-02c 2.065(3) V2-02g 2.059(3) V2-03h 2.087(2) <V2-O> 2.015 Quad. elon. (λ) 1.008 Angle vari. (σ ) 24.581 V(Å 3 ) 10.797 V3-05...

... et al. , 2011 ; Lussier and Hawthorne, 2011 ) regained proper attention. Note that with the renaming of the type material as fluor-liddicoatite, the hydroxy species ‘liddicoatite’ is no longer properly defined as a species. A new type material definition is necessary to re-establish the name. Two...

... was <0.6 Å. Chemical knowledge and literature data ( Hawthorne et al. 2000 ) show that all magnesium sulfate phases consist of (SO 4 ) tetrahedra and [Mg(O,H 2 O) 6 ] octahedra. Therefore, [SO 4 ] and [Mg(O,H 2 O) 6 ] groups were forced to be regular polyhedra with reasonable bond lengths and angles...

... be written XY 3 Z 6 [ T 6 O 18 ] (BO 3 ) 3 V 3 W , as proposed by Henry et al . (2011) . These authors and Hawthorne (1996 , 2002) suggest occupancies by the following most common cations: X = Na , K , Ca , □ ( vacancy ) Y = Mg , Fe 2 + , Mn 2 + , Al...

...Elena Sokolova; Frank C. Hawthorne Abstract The crystal structure of a murmanite-related mineral (MRM) of the murmanite group (seidozerite supergroup), ideally Na 2 CaTi 4 (Si 2 O 7 ) 2 O 4 (H 2 O) 4 , from Mt. Pyalkimpor, the Lovozero alkaline massif, Kola Peninsula, Russia, was refined in space...

.... Phillips W.R. ( 1982 ) The chemical formula of natural staurolite . American Mineralogist 67 , 292 – 267 . Hawthorne F.C. Ungaretti L. Oberti R. Caucia F. Callegari A. ( 1993 ) The crystal chemistry of staurolite; I, Crystal structure and site populations . Canadian...

..., 1969 ) and in southeastern California ( Grose, 1959 ). Most Sunrise and Dunlap rocks are exposed in the Hawthorne and Tonopah one-degree quadrangles, particularly in the Gabbs Valley Range, Garfield Hills, and Pilot Mountains ( Fig. 2 ). Isolated exposures also are present in surrounding mountain...

..., Currie, etcetera of the eastern Great Basin. In the Hawthorne-Tonopah area of southwest Nevada, Muller and Ferguson (28) and Ferguson and Muller (10) measured more than 3,000 feet of Lower Triassic shale, sandstone, limestone, and conglomerate—the Candelaria formation. This formation has been...

... of the Hawthorne and Tonopah Quadrangles, Nevada ,” ibid., Prof. Paper 216 . Ferguson , H. G. , and Muller , S. W. , and Cathcart , S. H. , 1953 , “ Geology of the Coaldale Quadrangle, Nevada ,” ibid., Quad. Map Ser. , GQ-23 . Ferguson , H. G. , 1954 , “ Geology of the Mina...

... to derive more realistic structural formulae. Harrington found that ferric iron amounts to 23.5% of the total iron in his amphibole, which does seem to be a reasonable value for an alkali gabbro that crystallized within 1.5 km of the surface. Hawthorne et al. (2012) proposed that in Ti-rich amphiboles...