Dissolution of Ca3(AsO4)2 · 2H2O in the system CaOAs2O5H2O at 35, 40, 45 and 50°C and the related thermodynamic data

Mahapatra, P. P.; Mahapatra, L. M.; Nanda, C. N.

doi:10.1016/0040-6031(84)87027-6

Cited by 4 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in the reduction state, arsenite is predominant and the complexes formed are mobile (Yang et al, 2015). The presence of Ca (97 ± 45 mg/kg) in the sample may promote the generation of Ca3(AsO4)2 as well (Mahapatra et al, 1984). Copper complexation may also occur in presence of As (Cu(OH)AsO4) (De Pedro et al, 2011), Fe (CuFe2O4) (Satheeshkumar et al, 2019) or SO4 2 − (CuSO4) (Xi et al, 2019), limiting Cu extraction.…”

Section: Elements Extractionmentioning

confidence: 99%

Electrodialytic treatment of secondary mining resources for raw materials extraction: Reactor design assessment

Almeida

Magro

Rosário

et al. 2021

Science of The Total Environment

View full text Add to dashboard Cite

Section: Elements Extractionmentioning

confidence: 99%

Electrodialytic treatment of secondary mining resources for raw materials extraction: Reactor design assessment

Almeida

Magro

Rosário

et al. 2021

Science of The Total Environment

View full text Add to dashboard Cite

“…The X-ray powder diffraction data of this material, published by Pierrot (1964), are similar to those of dobšináite form Dobšiná, but also contain reflections at 11.7 Å and 6.1 Å, which were probably caused by the presence of impurities in Guérin´s phase, e.g., a synthetic analog of phaunouxite. The solubility of Ca 3 (AsO 4 ) 2 •2H 2 O in water was studied by Chukhlantsev (1956) and Mahapatra et al (1984). Unfortunately, both studies lack any structural information.…”

Section: Comparison With Related Mineralsmentioning

confidence: 99%

Dobšináite, Ca2Ca(AsO4)2·2H2O, a new member of the roselite group from Dobšiná (Slovak Republic)

Sejkora¹,

Števko²,

Škoda³

et al. 2021

J. Geosci.

View full text Add to dashboard Cite

Dobšináite, ideally Ca 2 Ca(AsO 4 ) 2 •2H 2 O, is a new supergene mineral from the Dobšiná deposit, Slovak Republic, associated with phaunouxite, picropharmacolite, erythrite-hörnesite, gypsum and aragonite. It forms white to pink clusters or polycrystalline aggregates up to 1-4 mm in size consisting of densely intergrown, slightly rounded thin tabular to platy crystals up to 0.1 mm in size. Dobšináite has a white streak, vitreous luster, does not fluoresce under either short-or long-wave ultraviolet light. Cleavage on {010} is good, the Mohs hardness is ~3, and dobšináite is brittle with an uneven fracture. The calculated density is 3.395 g/cm 3 . Dobšináite is optically biaxial negative, the indices of refraction are α´ = 1.601(2) and γ´ = 1.629(2) and 2V meas. is 60° (+/-20°). Dobšináite is monoclinic, space group P2 1 /c, a = 5.990( 2), b = 13.013(4), c = 5.726(2) Å, β = 108.47(3)°, V = 423.3(3) Å 3 , Z = 2. The seven strongest lines in the X-ray powder diffraction pattern are as follows: d (Å)/I(hkl): 5.197/37(110); 3.443/38(130); 3.385/66(031); 3.249/77(040); 3.201/42(13-1); 3.026/100(121) and 2.822/60(10-2). The chemical analyses by electron microprobe yielded (in wt. %) CaO 36.74, MgO 0.89, NiO 0.37, CoO 0.51, P 2 O 5 0.03, As 2 O 5 52.75, SO 3 0.18, H 2 O calc. 8.31, total 99.78. The resulting empirical formula on the basis of 10 O atoms per formula unit is Ca 2 (Ca 0.84 Mg 0.10 Co 0.03 Ni 0.02 ) Σ0.99 [(AsO 4 ) 1.99 (SO 4 ) 0.01 ] Σ2.00 •2H 2 O. Dobšináite is the Ca-dominant member of the roselite group as confirmed by stoichiometry, X-ray powder diffraction data and Raman spectroscopy. It is named after its type locality Dobšiná, Slovak Republic. Dobšináite was formed during weathering of primary Co and As-bearing ore minerals (safflorite, arsenopyrite) in a Ca enriched environment under relatively dry conditions.

show abstract

ChemInform Abstract: DISSOLUTION OF CALCIUM ARSENATE HYDRATE (CA3(ASO4)2.2 H2O) IN THE SYSTEM CALCIUM OXIDE‐ARSENIC PENTOXIDE‐WATER AT 35, 40, 45 AND 50°C AND THE RELATED THERMODYNAMIC DATA

Mahapatra¹,

Mahapatra²,

Nanda³

1984

Chemischer Informationsdienst

View full text Add to dashboard Cite

Dissolution of Ca3(AsO4)2 · 2H2O in the system CaOAs2O5H2O at 35, 40, 45 and 50°C and the related thermodynamic data

Cited by 4 publications

References 7 publications

Electrodialytic treatment of secondary mining resources for raw materials extraction: Reactor design assessment

Electrodialytic treatment of secondary mining resources for raw materials extraction: Reactor design assessment

Dobšináite, Ca2Ca(AsO4)2·2H2O, a new member of the roselite group from Dobšiná (Slovak Republic)

ChemInform Abstract: DISSOLUTION OF CALCIUM ARSENATE HYDRATE (CA3(ASO4)2.2 H2O) IN THE SYSTEM CALCIUM OXIDE‐ARSENIC PENTOXIDE‐WATER AT 35, 40, 45 AND 50°C AND THE RELATED THERMODYNAMIC DATA

Contact Info

Product

Resources

About