Tricalcium aluminate hydration in the presence of calcium sulfite hemihydrate

Łagosz, Artur; Małolepszy, Jan

doi:10.1016/s0008-8846(02)00957-2

Cited by 23 publications

(16 citation statements)

References 1 publication

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“…In addition to Mn 2+ -and Fe 2+ -sulfite trihydrates, a number of hydrous M 2+ -sulfite compounds (M = Mg, Zn, Co, Ca, Cu, etc) have also been synthesized, including several Zn-sulfites, such as ZnSO3•2½H2O, ZnSO3•2H2O, ZnSO3•½H2O, and ZnSO3, (e.g., Lutz et al, 1977;Inoue et al, 1999;Lagosz and Malolepszy, 2003;Giorgi et al, 2011).…”

Section: Crystal Structure Description and Discussionmentioning

confidence: 99%

Mikenewite, the natural analogue of synthetic α-Mn²⁺(S⁴⁺O₃)⋅3H₂O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico

Yang

Jenkins

McGlasson

et al. 2023

MinMag

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A new mineral species, mikenewite (IMA 2022-102), ideally Mn 2+ (S 4+ O3)•3H2O, has been discovered from the San Judas Chimney, Ojuela mine, Mapimí, Durango, Mexico. It occurs as spheres of platy crystals. Associated minerals include goethite, cryptomelane, adamite, and lotharmeyerite. Mikenewite is yellowish in transmitted light, transparent with a white streak and vitreous luster. It is brittle and has a Mohs hardness of 2½-3. Cleavage is perfect on {101}. The measured and calculated densities are 2.48(5) and 2.467 g/cm 3 , respectively. Optically, mikenewite is biaxial (+), with α = 1.606(5), β = 1.614(5), γ = 1.627(1) (white light), 2V (meas.) = 69(3)º, 2V (calc.) = 77º. An electron microprobe analysis yielded an empirical formula (based on 6 O apfu) (Mn0.86Zn0.12Fe0.04Ca0.02)Σ1.04(S0.98O3)3H2O, which can be simplified to (Mn,Zn,Fe)(SO3)3H2O.Mikenewite is the natural analogue of synthetic α-Mn 2+ (S 4+ O3)3H2O, as well as the Mn-analogue of albertiniite, Fe 2+ (S 4+ O3)3H2O. It is monoclinic, with space group

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Section: Crystal Structure Description and Discussionmentioning

confidence: 99%

Mikenewite, the natural analogue of synthetic α-Mn²⁺(S⁴⁺O₃)⋅3H₂O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico

Yang

Jenkins

McGlasson

et al. 2023

MinMag

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“…The highest closed porosity of alumina sol‐treated CaO granules because the reaction product layer was formed around the external CaO grains as a protective layer, which reduced the apparent porosity of CaO granules and was beneficial for its hydration resistance. Meanwhile, it is noted that the hydration of C 3 A in the presence of Ca(OH) 2 was retarded by an impermeable C 4 AH x coating around the C 3 A grains which retarded water diffusion to the anhydrous surface 29,30 . Impurities in the raw material, like Fe 2 O 3 and MgO, might enter the crystal lattice of C 3 A during the sintering process that retarded the hydration of C 3 A 23,31,32 .…”

Section: Discussionmentioning

confidence: 99%

Improved hydration resistance of CaO granules via sol‐processed metal oxide protective layers

Wei

Jin-hu

et al. 2021

J Am Ceram Soc

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Well‐sintered CaO granules with hydration resistance are very important for the manufacturing and application of CaO‐containing refractories. CaO granules with sol‐processed metal oxide protective layers were prepared by granulation and surface treatment. The obtained results indicated that the usage of nano sol greatly improved the hydration resistance of CaO granules, especially when the CaO granules were treated by alumina sol. The promoting effect of nano sols in the sintering processes improved the density of CaO granules. Nanoparticles reacted with lime at lower temperature and a new phase was formed uniformly in the treated layer, which promoted densification of the treated layer. The grain size of CaO granules in the treated layer was increased obviously with the promotion of sintering. Moreover, nanoparticles were favorable for the formation of direct bonding between CaO grains by decreasing the dihedral angle.

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“…It was also re ported as one of the com po nents of the Ro man ce ment (Adamski et al, 2009). Monosulphite is also a prod uct of ce ment hydration (in cementitious sys tems, sulphite ions are of ten ob served when sulphuric sources are avail able; £agosz and Ma³olepszy, 2003;Suh et al, 2019). Unreacted and unhydrated com po nents of Roman ce ments (in good qual ity ce ments pres ent only in very small quan ti ties) -cal cium sil i cates: b-belite (b-C 2 S; as less re ac tive then a'-belite), gehlenite (C 2 AS) and wollastonite (CS) can be labelled as Ro man ce ment fin ger print phases (Adamski et al, 2009;Koz³owski et al, 2010).…”

Section: Methodsmentioning

confidence: 99%

Mineralogical and geochemical studies of secondary mineral assemblages related to deterioration of building materials

Marszałek

Dudek

Gaweł

et al. 2019

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and Tech nol ogy, Fac ulty of Ge ol ogy, Geo phys ics and En vi ron men tal Pro tec tion, al. A. Mickiewicza 30, 30-059 Kraków, Po landMarsza³ek, M., Dudek, K., Gawe³, A., Czerny, J., 2019. Min er al og i cal and geo chem i cal stud ies of sec ond ary min eral as semblages re lated to de te ri o ra tion of build ing ma te ri als. Geo log i cal Quar terly, 63 (4): 683-698, doi: 10.7306/gq.1494The study was aimed at min er al og i cal and geo chem i cal char ac ter is tics of sec ond ary phases re lated to de te ri o ra tion of historic build ing ma te ri als. The in ves ti ga tions, car ried out in the Holy Trin ity Ba sil ica in Kraków, Po land, fo cused on the south ern facade of the 17th-cen tury Myszkowskis Cha pel, built of the Mio cene Piñczów lime stone. Lower part of the facade is cov ered with a ce ment ren der, and the ex posed foun da tions are made of Ju ras sic lime stone and Cre ta ceous sand stone, both of lo cal or i gin from the Kraków re gion and neigh bour ing Carpathians, in the form of ir reg u lar blocks bound with a ce ment mor tar. The wall sur face ex hib its clear signs of dam age; from dark grey soil ing and scal ing to efflorescences. Sam pled ma te ri als, de te ri orated, al tered crusts and efflorescences were an a lysed with op ti cal and scan ning elec tron mi cros copy, X-ray dif frac tion, and Raman microspectroscopy meth ods. The sec ond ary min er als dis tin guished in clude abun dant gyp sum CaSO 4 ·2H 2 O, less com mon thenardite Na 2 SO 4 (and/or mirabilite Na 2 SO 4ÿ 10H 2 O), aphthitalite (K, Na) 3 Na(SO 4 ) 2 , darapskite Na 3 (SO 4 )(NO 3 )·H 2 O, ettringite Ca 6 Al 2 (SO 4 ) 3 (OH) 12 ·26H 2 O, monosulphite Ca 4 Al 2 O 6 SO 3 ·11H 2 O, as well as scarce ni tre KNO 3 , nitratine NaNO 3 and ha lite NaCl. Gyp sum usu ally forms sur face crusts and fills the pores in side some ma te ri als. The efflorescences, sam pled from the ex posed foun da tions, con sisted of thenardite and/or mirabilite, aphthitalite and darapskite, whereas ettringite and monosulphite were con nected with ce ment ren ders. Traces of ni tre, nitratine and ha lite were de tected at var i ous el e ments of the cha pel facade and foun da tions. The or i gin of the salts is re lated to com po si tion and physicochemical prop er ties of the build ing ma te ri als, as well as to anthropogenic fac tors.

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Tricalcium aluminate hydration in the presence of calcium sulfite hemihydrate

Cited by 23 publications

References 1 publication

Mikenewite, the natural analogue of synthetic α-Mn²⁺(S⁴⁺O₃)⋅3H₂O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico

Mikenewite, the natural analogue of synthetic α-Mn²⁺(S⁴⁺O₃)⋅3H₂O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico

Improved hydration resistance of CaO granules via sol‐processed metal oxide protective layers

Mineralogical and geochemical studies of secondary mineral assemblages related to deterioration of building materials

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Tricalcium aluminate hydration in the presence of calcium sulfite hemihydrate

Cited by 23 publications

References 1 publication

Mikenewite, the natural analogue of synthetic α-Mn2+(S4+O3)⋅3H2O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico

Mikenewite, the natural analogue of synthetic α-Mn2+(S4+O3)⋅3H2O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico

Improved hydration resistance of CaO granules via sol‐processed metal oxide protective layers

Mineralogical and geochemical studies of secondary mineral assemblages related to deterioration of building materials

Contact Info

Product

Resources

About

Mikenewite, the natural analogue of synthetic α-Mn²⁺(S⁴⁺O₃)⋅3H₂O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico

Mikenewite, the natural analogue of synthetic α-Mn²⁺(S⁴⁺O₃)⋅3H₂O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico