Research output: Contribution to journal › Article › peer-review
Nonstoichiometry in the systems Na2MoO4–MMoO4 (M = Co, Cd), crystal structures of Na3.36Co1.32(MoO4)3, Na3.13Mn1.43(MoO4)3 and Na3.72Cd1.14(MoO4)3, crystal chemistry, compositions and ionic conductivity of alluaudite-type double molybdates and tungstates. / Solodovnikov, Sergey F.; Solodovnikova, Zoya A.; Zolotova, Evgeniya S. et al.
In: Journal of Solid State Chemistry, Vol. 253, 01.09.2017, p. 121-128.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Nonstoichiometry in the systems Na2MoO4–MMoO4 (M = Co, Cd), crystal structures of Na3.36Co1.32(MoO4)3, Na3.13Mn1.43(MoO4)3 and Na3.72Cd1.14(MoO4)3, crystal chemistry, compositions and ionic conductivity of alluaudite-type double molybdates and tungstates
AU - Solodovnikov, Sergey F.
AU - Solodovnikova, Zoya A.
AU - Zolotova, Evgeniya S.
AU - Yudin, Vasiliy N.
AU - Gulyaeva, Oksana A.
AU - Tushinova, Yunna L.
AU - Kuchumov, Boris M.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - As results of a powder XRD study of sintered samples of the systems Na2MoO4–MMoO4 (M = Co, Cd) quenched in air from 873 K, the literature data on the phase formation and homogeneity ranges of nonstoichiometric double molybdates in these systems were corrected. The compounds are monoclinic alluaudite-type Na4-2xCo1+x(MoO4)3 (0.05 ≤ x ≤ 0.30) and Na4-2xCd1+x(MoO4)3 (0.10 ≤ x ≤ 0.40), orthorhombic lyonsite-type Na2-2yCo2+y(MoO4)3 (0.05 ≤ y ≤ 0.25), and triclinic Na2-2zCo2+z(MoO4)3 (0.10 ≤ z ≤ 0.40) of the Na2Mg5(MoO4)6 type. The temperature of the orthorhombic-to-triclinic phase transition was found to be 943 ± 10 K. Crystal structures of the alluaudite-type double molybdates (space group C2/c, Z = 4) with cobalt, manganese, and cadmium were determined. According to the atomic position occupations, the compositions for the crystals were found as Na3.36Co1.32(MoO4)3 (a = 12.6381(3), b = 13.4888(4), c = 7.1244(2) Å, β = 112.127(1)° R = 0.0207), Na3.13Mn1.43(MoO4)3 (a = 12.7387(3), b = 13.6716(4), c = 7.1904(2) Å, β = 112.404(1)°, R = 0.0166), and Na3.72Cd1.14(MoO4)3 (a = 12.804(3), b = 13.913(3), c = 7.326(2) Å, β = 112.63(1)° R = 0.0158). The crystal chemistry and compositions of the alluaudite-type molybdates and tungstates were considered and mainly one-dimensional character of the sodium-ion transport was shown for them. The measured values of the ionic conductivity of sintered samples of Na3.6M1.2(MoO4)3 (M = Mg, Ni, Zn, Cd) and Na3.6Mg1.2(WO4)3 exceeds 10−3 S cm−1 at 673 K.
AB - As results of a powder XRD study of sintered samples of the systems Na2MoO4–MMoO4 (M = Co, Cd) quenched in air from 873 K, the literature data on the phase formation and homogeneity ranges of nonstoichiometric double molybdates in these systems were corrected. The compounds are monoclinic alluaudite-type Na4-2xCo1+x(MoO4)3 (0.05 ≤ x ≤ 0.30) and Na4-2xCd1+x(MoO4)3 (0.10 ≤ x ≤ 0.40), orthorhombic lyonsite-type Na2-2yCo2+y(MoO4)3 (0.05 ≤ y ≤ 0.25), and triclinic Na2-2zCo2+z(MoO4)3 (0.10 ≤ z ≤ 0.40) of the Na2Mg5(MoO4)6 type. The temperature of the orthorhombic-to-triclinic phase transition was found to be 943 ± 10 K. Crystal structures of the alluaudite-type double molybdates (space group C2/c, Z = 4) with cobalt, manganese, and cadmium were determined. According to the atomic position occupations, the compositions for the crystals were found as Na3.36Co1.32(MoO4)3 (a = 12.6381(3), b = 13.4888(4), c = 7.1244(2) Å, β = 112.127(1)° R = 0.0207), Na3.13Mn1.43(MoO4)3 (a = 12.7387(3), b = 13.6716(4), c = 7.1904(2) Å, β = 112.404(1)°, R = 0.0166), and Na3.72Cd1.14(MoO4)3 (a = 12.804(3), b = 13.913(3), c = 7.326(2) Å, β = 112.63(1)° R = 0.0158). The crystal chemistry and compositions of the alluaudite-type molybdates and tungstates were considered and mainly one-dimensional character of the sodium-ion transport was shown for them. The measured values of the ionic conductivity of sintered samples of Na3.6M1.2(MoO4)3 (M = Mg, Ni, Zn, Cd) and Na3.6Mg1.2(WO4)3 exceeds 10−3 S cm−1 at 673 K.
KW - Alluaudite
KW - Cadmium
KW - Cobalt
KW - Crystal chemistry
KW - Crystal structure
KW - Double molybdates
KW - Double tungstates
KW - Homogeneity range
KW - Ionic conductivity
KW - Manganese
KW - Nonstoichiometry
KW - Sodium
KW - FUMAROLIC SUBLIMATE
KW - STRUCTURE CRISTALLINE
KW - CATHODE MATERIAL
KW - PHOSPHATE
KW - PHASE
KW - PARAGENESIS
KW - NA
KW - DESCRIPTIVE MINERALOGY
KW - IZALCO VOLCANO
KW - EL-SALVADOR
UR - http://www.scopus.com/inward/record.url?scp=85020028213&partnerID=8YFLogxK
U2 - 10.1016/j.jssc.2017.05.031
DO - 10.1016/j.jssc.2017.05.031
M3 - Article
AN - SCOPUS:85020028213
VL - 253
SP - 121
EP - 128
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
ER -
ID: 9981411