Study of the system CaOSiO2CO2H2O in relation to scawtite under hydrothermal conditions

In addition to spurrite, Ca5(SiO4)2(CO3), and tilleyite, Ca5(Si2O7)(CO3)2, galuskinite, C is the third mineral in the CaO—SiO2—CO2ternary system. Galuskinite, monoclinic, space groupP21/c (a =18.79,b =6.72,c= 10.47 Å, β = 90.79°,V =1322 Å3,Z =4), occurs in thin veins which cut calcio-olivine, γ-Ca2SiO4, skarn with larnite, β-Ca2SiO4, relics. Pavlovskyite, Ca8(SiO4)2(Si3O10), and dellaite, Ca6(Si2O7)(SiO4)(OH)2, form a margin between the veins and the calcio-olivine skarn. The sanidinite facies high-temperature skarn formed ∼500 Ma ago when gabbroid rocks of the Birkhin complex (Baikal area, Eastern Siberia, Russia) intruded and contact-metamorphosed limestone xenoliths. Galuskinite is a retrograde product of skarn alteration and has neither been described from cement clinker production processes nor from studies of the CaO—SiO2—CO2system. The crystal structure of galuskinite, refined from single crystal X-ray data toRi =3.1%, has a modular character. One may define a polysomatic series with spurrite and larnite as endmembers and galuskinite as a 1:1 polysome built from regular alternating spurrite and larnite modules. Differences between the X-ray powder patterns of galuskinite and spurrite are most obvious in the low 8 region. Galuskinite is named after the Russian mineralogists Irina O. Galuskina and Evgeny V. Galuskin, Faculty of Earth Sciences. University of Silesia, Poland, for their outstanding contributions to skarn mineralogy.

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“…Scawtite is formed at temperatures between 140ºC and 300ºC (e.g. Kapralik et al, 1984;Garbev, 2004).…”

Section: Introductionmentioning

confidence: 99%

Galuskinite, Ca₇(SiO₄)₃(CO₃), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia

Lazić¹,

Armbruster²,

Savelyeva³

et al. 2011

Mineral. mag.

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“…The mixture of MSp product with Portland clinker, heated up to 1300˚C, exhibited almost total disappearance of spinel MA from the product, decomposition of silicate C 3 S and aluminate phases, and calcium sulphate from Portland clinker ( Table 1 and Table 3). As a result of the reaction new phases were formed, coexisting with MgO and C 2 S. They involve quaternary aluminate, so-called Q phase, which can be expressed by the formula C 20 A 13 M 3 S 3 [12] and calcium sulphate aluminate C 3 A 3 •CaSO 4 , stable to 1350˚C [13]. However, in the mixture of MSp product with Portland clinker, heated up to 1400°C, apart from MgO and C 2 S, new phases were found, which coexisted with them in sub-solidus.…”

Section: Products Of the Reactions In The Powder Mixtures Examined Bymentioning

confidence: 99%

“…However, in the mixture of MSp product with Portland clinker, heated up to 1400°C, apart from MgO and C 2 S, new phases were found, which coexisted with them in sub-solidus. These were gehlenite C 2 AS and Q phase [12]. Since in the mixtures with MSp the C 4 AF phase disappeared, it may be expected that iron came within a solid solution (henceforth designated as "ss.")…”

Section: Products Of the Reactions In The Powder Mixtures Examined Bymentioning

confidence: 99%

Corrosion of Basic Refractories in Contact with Cement Clinker and Kiln Hot Meal

Szczerba¹,

Jastrzębska²,

Pędzich³

et al. 2014

MSCE

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This paper investigates the new phases formation in the magnesia-spinel, magnesia-zirconia-calcia and magnesia-hercynite refractory products as a result of their reaction with kiln hot meal and cement clinker (both rich in SO 3 and Cl ions) at the temperature range 1200°C-1450˚C. The laboratory corrosion tests were conducted by means of pulverous method and by special coating test. The phase identity of the products as well as the mixes after corrosion tests was established by powder X-ray diffraction method. The microstructure development of the contact zones between coating and the products were studied using scanning electron microscopy SEM with EDS spectroscopy. The differences in the reactions proceeding between the phases of the test bricks and the phases of kiln hot meal and cement clinker in dependence on the temperatures have been discussed.

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“…This nomenclature is also adapted from Richardson’s work that summarized and modeled the calcium silicate hydrates that exist in nature and in engineered cements . The composition of phases that form in the CaO–SiO 2 –(CO 2 )–H 2 O system is complex and highly variable, depending primarily on molar ratios of dissolved species, as shown in phase diagrams and schematics in Kaprálik et al…”

Section: Introductionmentioning

confidence: 99%

“…This nomenclature is also adapted from Richardson's work that summarized and modeled the calcium silicate hydrates that exist in nature and in engineered cements. 33 The composition of phases that form in the CaO−SiO 2 −(CO 2 )−H 2 O system is complex and highly variable, depending primarily on molar ratios of dissolved species, as shown in phase diagrams and schematics in Kapraĺik et al 34 The goal of this work is to examine how the precipitation dynamics of carbonates and CCSHs impact fluid transport in porous media under natural or engineered conditions representative of the deep subsurface, which are expected to vary widely. For example, in basalt-based GCS, the relatively high pH of natural waters (9−11) 35 may facilitate CCSH precipitation, particularly in regions where the concentration of CO 2 is relatively low (e.g., the periphery of the CO 2 plume or in leakage locations).…”

Section: Introductionmentioning

confidence: 99%

Targeted Permeability Control in the Subsurface via Calcium Silicate Carbonation

Plattenberger

Ling

Peters

et al. 2019

Environ. Sci. Technol.

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Efforts to develop safe and effective next-generation energy and carbon-storage technologies in the subsurface require novel means to control undesired fluid migration. Here we demonstrate that the carbonation of calcium silicates can produce reaction products that dramatically reduce the permeability of porous media and that are stable. Most calcium silicates react with CO2 to form solid carbonates but some polymorphs (here, pseudowollastonite, CaSiO3) can react to form a range of crystalline calcium silicate hydrates (CCSHs) at intermediate pH. High-pressure (1.1–15.5 MPa) column and batch experiments were conducted at a range of temperatures (75–150 °C) and reaction products were characterized using SEM-EDS and synchrotron μXRD and μXRF. Two characteristics of CCSH precipitation were observed, revealing unique properties for permeability control relative to carbonate precipitates. First, precipitation of CCSHs tends to occur on the surface of sand grains and into pore throats, indicating that small amounts of precipitation relative to the total pore volume can effectively block flow, compared to carbonates which precipitate uniformly throughout the pore space. Second, the precipitated CCSHs are more stable at low pH conditions, which may form more secure barriers to flow, compared to carbonates, which dissolve under acidic conditions.

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Study of the system CaOSiO2CO2H2O in relation to scawtite under hydrothermal conditions

Cited by 15 publications

References 14 publications

Galuskinite, Ca₇(SiO₄)₃(CO₃), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia

Galuskinite, Ca₇(SiO₄)₃(CO₃), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia

Corrosion of Basic Refractories in Contact with Cement Clinker and Kiln Hot Meal

Targeted Permeability Control in the Subsurface via Calcium Silicate Carbonation

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Study of the system CaOSiO2CO2H2O in relation to scawtite under hydrothermal conditions

Cited by 15 publications

References 14 publications

Galuskinite, Ca7(SiO4)3(CO3), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia

Galuskinite, Ca7(SiO4)3(CO3), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia

Corrosion of Basic Refractories in Contact with Cement Clinker and Kiln Hot Meal

Targeted Permeability Control in the Subsurface via Calcium Silicate Carbonation

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Product

Resources

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Galuskinite, Ca₇(SiO₄)₃(CO₃), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia

Galuskinite, Ca₇(SiO₄)₃(CO₃), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia