Research output: Contribution to journal › Article › peer-review
Crystal chemistry of Na-rich kihlmanite-(Ce) from arfvedsonite-aegirine-microcline pegmatite at the kihlman Mt. (Khibiny massif, Kola Peninsula, Russia). / Panikorovskii, T. L.; Kalashnikova, G. O.; Zhitova, E. S.; Pakhomovsky, Ya A.; Bocharov, V. N.; Yakovenchuk, V. N.; Zolotarev, A. A.; Krivovichev, S. V.
In: Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, Vol. 146, No. 2, 2017, p. 113-124.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Crystal chemistry of Na-rich kihlmanite-(Ce) from arfvedsonite-aegirine-microcline pegmatite at the kihlman Mt. (Khibiny massif, Kola Peninsula, Russia)
AU - Panikorovskii, T. L.
AU - Kalashnikova, G. O.
AU - Zhitova, E. S.
AU - Pakhomovsky, Ya A.
AU - Bocharov, V. N.
AU - Yakovenchuk, V. N.
AU - Zolotarev, A. A.
AU - Krivovichev, S. V.
N1 - Publisher Copyright: © 2017 Eco-Vector LLC. All rights reserved. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Chemical composition, crystal structure, and Raman spectrum have been investigated for the Na-rich kihlmanite-(Ce). Chemical composition of this mineral: Na 2 O 4.83, SiO 2 9.76, CaO 0.94, TiO 2 11.74, Nb 2 O 5 1.83, La 2 O 3 10.63, Ce 2 O 3 26.22, Pr 2 O 3 2.23, Nd 2 O 3 9.00, Sm 2 O 3 1.30, CO 2 14.40, H 2 O 6.00, corresponds to empirical formula: (Na 0.95 Ca 0.11 ) 1.06 (Ce 0.98 La 0.40 Nd 0.33 Pr 0.08 Sm 0.05 ) 1.85 (Ti 0.91 Nb 0.08 ) 0.99 O 2 [Si 1.00 O 4 ] {(HCO 3 ) 1.24 (CO 3 ) 0.76 } 2 H 2 O. Raman spectrum contains following lines: 850, 722, (v 3 , Si-O) 564, 610, 424 (v 2 , v 4 , Si-O), 1069, 919, 964 (v 1 , CO 3 , HCO 3 ), 675 (v 4 , CO 3 ), 388 (CaO 6 , NaO 6 ), 290 (TiO 6 ) cm -1 . Crystal structure is refined in the space group P1 (a = 5.0005(3), b = = 7.5273(6), c = 15.3344(16) A, α = 101.950(8), β = 92.938(7), γ = 109.323(7)°) up to the value of crystallographic repeatability factor R 1 = 0.054 for 1842 independent reflections (|F o | > 4σF). Obtained crystal-chemical formula may be written as following: (Na 1.10 Ca 0.11 ) 1.21 Ce 2.00 (Ti 0.77 Nb 0.23 ) 1.00 O 2.00 [Si 1.00 O 4.00 ]{(CO 3 ) 1.55 (HCO 3 ) 0.45 } 2.00 H 2 O 1.16 . Na atoms occupy in the structure three independent positions: Na(l), Na(2) and Na(3). The presence of additional sodium site, relatively to the standard kihlmanite-(Ce), enforces chemical bonds between «tundrite» layers due to decrease of the unit cell parameter c by ∼ 0.1 A. Occurrence of sodium in the kihlmanite-(Ce) structure by the scheme: + HOC 3 - Na + CO 3 2- leads to the dominance of CO 3 2- groups in hydrocarbonate position.
AB - Chemical composition, crystal structure, and Raman spectrum have been investigated for the Na-rich kihlmanite-(Ce). Chemical composition of this mineral: Na 2 O 4.83, SiO 2 9.76, CaO 0.94, TiO 2 11.74, Nb 2 O 5 1.83, La 2 O 3 10.63, Ce 2 O 3 26.22, Pr 2 O 3 2.23, Nd 2 O 3 9.00, Sm 2 O 3 1.30, CO 2 14.40, H 2 O 6.00, corresponds to empirical formula: (Na 0.95 Ca 0.11 ) 1.06 (Ce 0.98 La 0.40 Nd 0.33 Pr 0.08 Sm 0.05 ) 1.85 (Ti 0.91 Nb 0.08 ) 0.99 O 2 [Si 1.00 O 4 ] {(HCO 3 ) 1.24 (CO 3 ) 0.76 } 2 H 2 O. Raman spectrum contains following lines: 850, 722, (v 3 , Si-O) 564, 610, 424 (v 2 , v 4 , Si-O), 1069, 919, 964 (v 1 , CO 3 , HCO 3 ), 675 (v 4 , CO 3 ), 388 (CaO 6 , NaO 6 ), 290 (TiO 6 ) cm -1 . Crystal structure is refined in the space group P1 (a = 5.0005(3), b = = 7.5273(6), c = 15.3344(16) A, α = 101.950(8), β = 92.938(7), γ = 109.323(7)°) up to the value of crystallographic repeatability factor R 1 = 0.054 for 1842 independent reflections (|F o | > 4σF). Obtained crystal-chemical formula may be written as following: (Na 1.10 Ca 0.11 ) 1.21 Ce 2.00 (Ti 0.77 Nb 0.23 ) 1.00 O 2.00 [Si 1.00 O 4.00 ]{(CO 3 ) 1.55 (HCO 3 ) 0.45 } 2.00 H 2 O 1.16 . Na atoms occupy in the structure three independent positions: Na(l), Na(2) and Na(3). The presence of additional sodium site, relatively to the standard kihlmanite-(Ce), enforces chemical bonds between «tundrite» layers due to decrease of the unit cell parameter c by ∼ 0.1 A. Occurrence of sodium in the kihlmanite-(Ce) structure by the scheme: + HOC 3 - Na + CO 3 2- leads to the dominance of CO 3 2- groups in hydrocarbonate position.
KW - Crystal structure
KW - Khibiny massif
KW - Kihlmanite-(Ce)
KW - Na-rich
KW - Raman spectrum
UR - http://www.scopus.com/inward/record.url?scp=85063745223&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85063745223
VL - 146
SP - 113
EP - 124
JO - ЗАПИСКИ РОССИЙСКОГО МИНЕРАЛОГИЧЕСКОГО ОБЩЕСТВА
JF - ЗАПИСКИ РОССИЙСКОГО МИНЕРАЛОГИЧЕСКОГО ОБЩЕСТВА
SN - 0869-6055
IS - 2
ER -
ID: 77722861