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barytocalcite

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Back-scattered electron images of <span class="search-highlight">barytocalcite</span> with sodalite, calcite and ...
Published: 24 March 2022
Fig. 15. Back-scattered electron images of barytocalcite with sodalite, calcite and ferroan dolomite being replaced by baryte, calcite, Sr-rich calcite (a) and nordstrandite (b). Abreviations as in Fig. 4 .
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Representative compositions of <span class="search-highlight">barytocalcite</span> from Mount Mather Creek.      ...
Published: 24 March 2022
Table 4. Representative compositions of barytocalcite from Mount Mather Creek. Wt. % 1 2 3 4 5 6 7 8 9 10 11 12 ThO 2 n.d. n.d. n.d. n.d. n.d. n.d. 0.05 n.d. 0.14 0.04 n.d. 0.06 Ce 2 O 3 0.18 0.34 n.d. n.d. 0.19 0.08 0.20 0.21 n.d
Journal Article
Published: 24 March 2022
Mineralogical Magazine (2022) 86 (2): 282–306.
...Fig. 15. Back-scattered electron images of barytocalcite with sodalite, calcite and ferroan dolomite being replaced by baryte, calcite, Sr-rich calcite (a) and nordstrandite (b). Abreviations as in Fig. 4 . ...
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A. Galena and sphalerite concentrated along individual barite beds within t...
Published: 01 August 2020
(BSE), which is shown in more detail in D and E (EDS), where barium carbonate minerals are clearly associated with galena mineralization. F. A celsian nodule that is overgrown by barytocalcite (BSE). G and H. High-resolution BSE (G) and EDS (H) images from the area shown in F, showing the dissolution
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Back-scattered electron images of ancylite-(Ce) associated with barytocalci...
Published: 24 March 2022
Fig. 13. Back-scattered electron images of ancylite-(Ce) associated with barytocalcite, baryte and edingtonite. Abreviations as in Fig. 4 .
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REPRESENTATIVE COMPOSITIONS OF <span class="search-highlight">BARYTOCALCITE</span>
Published: 01 August 2008
TABLE 7. REPRESENTATIVE COMPOSITIONS OF BARYTOCALCITE
Journal Article
Journal: Economic Geology
Published: 01 August 2020
Economic Geology (2020) 115 (5): 961–979.
... (BSE), which is shown in more detail in D and E (EDS), where barium carbonate minerals are clearly associated with galena mineralization. F. A celsian nodule that is overgrown by barytocalcite (BSE). G and H. High-resolution BSE (G) and EDS (H) images from the area shown in F, showing the dissolution...
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Journal Article
Published: 01 February 1977
American Mineralogist (1977) 62 (1-2): 36–50.
...B. E. Scheetz; W. B. White Abstract Raman spectra and mid-range and far infrared spectra have been measured on polycrystalline norsethite [BaMg(C0 3 ) 2 ], barytocalcite [BaCa(CO 3 ) 2 ], the high-temperature modification of barytocalcite, huntite [CaMg 3 (C0 3 ) 4 ], benstonite [Ca 7 Ba 6 (CO 3 )i...
Journal Article
Journal: Economic Geology
Published: 01 May 2016
Economic Geology (2016) 111 (3): 695–718.
... produced higher δ 34 S and δ 18 O values of the diagenetic barite compared to contemporaneous seawater sulfate. The δ 13 C values of Ba carbonate minerals (witherite and barytocalcite) vary from −10.8 to −23.6‰ (avg −14.1 ± 3.2‰, 1 σ , n = 84) and indicate the involvement of carbon from oxidized organic...
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Journal Article
Published: 01 August 2008
The Canadian Mineralogist (2008) 46 (4): 843–860.
...TABLE 7. REPRESENTATIVE COMPOSITIONS OF BARYTOCALCITE ...
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Journal Article
Journal: Economic Geology
Published: 01 April 1991
Economic Geology (1991) 86 (2): 354–363.
... found in the black cherts associated with witherite and barytocalcite ores.From the geosyncline to the platform, delta 34 S values of the barites increase, reaching values as high as 50 per mil. The lowest delta 34 S value of barite (8ppm) is within witherite ore beds, suggesting that some sulfur...
Journal Article
Published: 01 October 1971
American Mineralogist (1971) 56 (9-10): 1660–1673.
... members of the system CaCO 3 -BaCO 3 are very limited, but the binary compound, barytocalcite, is stable over a large range of compositions and can take as much as 12.5 mole percent excess CaCO 3 at 660°C and 9.0 mole percent excess BaCO 3 at 750°C without losing its monoclinic character. In the ternary...
Journal Article
Published: 01 August 1964
American Mineralogist (1964) 49 (7-8): 1142–1143.
... been found in nature, but CaBa(CO 3 ) 2 in the form of barytocalcite is the only compound of this type to have been synthesized (Chang, 1964). The 1:1 CaCO 3 -BaCO 3 composition produced in the laboratory is in the monoclinic barytocalcite structure at temperatures below 520° C. and as a disordered...
Image
A. Composite hand sample photograph showing patchy barite replacement (uppe...
Published: 01 August 2020
. Photomicrograph composite (crossed-polarized light) of barite undergoing replacement by sphalerite and barytocalcite. The red box highlights the area shown in F and G, which are higher-resolution images of the sphalerite-barytocalcite assemblage shown in reflected (F) and cross-polarized transmitted light (G
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Variation plots of the  δ  18 O and  δ  13 C values of witherite and baryto...
Published: 01 May 2016
Fig. 12 Variation plots of the δ 18 O and δ 13 C values of witherite and barytocalcite from the northern and southern belts in Qinling-Daba region (A), and of specific minerals from specific ore deposits (B–F).
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Field-emission scanning electron microscope backscattered-electron (BSE) im...
Published: 01 September 2019
crosscutting these lamellae. Abbreviations: bcal, barytocalcite; fap, fluorapatite; hhd, hydroxylhedyphane; hsm, hausmannite; srp, serpentine-subgroup mineral. Sample GEO-NRM#19070258.
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T-X  diagrams of the systems BaCO 3 –CaCO 3  and SrCO 3 –CaCO 3  at 7 atm (...
Published: 01 January 2015
Fig. 11. T-X diagrams of the systems BaCO 3 –CaCO 3 and SrCO 3 –CaCO 3 at 7 atm ( Chang, 1965 ) ( a , c ) and 2.5 GPa ( Chang, 1971 ) ( b , d ). Wth = witherite, BCal = barytocalcite, Cal = calcite, Cal D = disordered calcite, Arg = aragonite, Str = strontianite.
Journal Article
Published: 01 February 2019
Mineralogical Magazine (2019) 83 (1): 107–113.
... shaped relics of amorphous U–Ta-rich hydroxykenopyrochlore inside. Characteristic associated minerals include rock-forming calcite, dolomite, forsterite, hydroxylapatite, magnetite and phlogopite, accessory baddeleyite, baryte, barytocalcite, chalcopyrite, chamosite–clinochlore, galena, gladiusite...
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Journal Article
Published: 31 January 2019
Mineralogical Magazine (2019) 83 (3): 401–411.
..., barytocalcite, calcite, ilmenite, hydro-zircon, baotite, strontianite, allanite, quartz and pyrite. The absence of wadeite and priderite have been compensated for by the presence of baotite, rutile, titanite, baryte and hydro-zircons. The presence of the secondary phases: allanite, hydro-zircon, chlorite...
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Journal Article
Published: 29 July 2020
Mineralogical Magazine (2020) 84 (5): 699–704.
...://creativecommons.org/licenses/by/4.0/ ), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. alstonite carbonate barium calcium crystal structure twinning Alstonite, BaCa(CO 3 ) 2 , is polymorphous with barytocalcite...
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