Abstract
The compounds A14MnPn11 (A = Ca, Sr, Ba; Pn = As, Sb), have been synthesized by reacting the elements in stoichiometric amounts in welded Nb tubes sealed in quartz ampules at high temperature (1250°C). Single-crystal X-ray data (130 K, tetragonal, I41/acd (142), Z = 8) were refined for all compounds except Ba14MnAs11: a = 16.688 (8) Å, c = 22.266 (9) Å (R = 5.82%, Rw = 6.95%, Ca14MnSb11); a = 17.511 (4), c = 23.321 (7) Å, (R = 4.07%, Rw = 3.93%, Sr14MnSb11); a = 18.394 (3), c = 24.069 (6) Å (R = 7.52%, Rw = 6.96%, Ba14MnSb11); a = 15.754 (3), c = 21.037 (7) Å (R = 4.09%, R2 = 8.82%, Ca14Mn As11); a = 16.576 (10), c = 22.167 (14) Å (R = 5.70%, Rw = 4.87%, Sr14MnAs11). These compounds are isostructural to the main-group Zintl compound Ca14AlSb11. Magnetization measurements performed on powder samples have shown that the antimony compounds are ferromagnets with ordering temperatures of 65 (Ca), 45 (Sr), and 20 K (Ba), whereas the arsenic compounds are paramagnetic down to 5 K. The temperature dependence of the resistivity of pressed pellets indicates that the Sb compounds may be metallic and the As compounds are semiconductors.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 93-99 |
| Number of pages | 7 |
| Journal | Chemistry of Materials |
| Volume | 6 |
| Issue number | 1 |
| State | Published - 1994 |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
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Structure and properties of the transition-metal zintl compounds A14MnPn11 (A = Ca, Sr, Ba; Pn = As, Sb). / Rehr, Anette; Kuromoto, Traci Y.; Kauzlarich, Susan M.; Del Castillo, J.; Webb, David J.
In: Chemistry of Materials, Vol. 6, No. 1, 1994, p. 93-99.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Structure and properties of the transition-metal zintl compounds A14MnPn11 (A = Ca, Sr, Ba; Pn = As, Sb)
AU - Rehr, Anette
AU - Kuromoto, Traci Y.
AU - Kauzlarich, Susan M.
AU - Del Castillo, J.
AU - Webb, David J.
PY - 1994
Y1 - 1994
N2 - The compounds A14MnPn11 (A = Ca, Sr, Ba; Pn = As, Sb), have been synthesized by reacting the elements in stoichiometric amounts in welded Nb tubes sealed in quartz ampules at high temperature (1250°C). Single-crystal X-ray data (130 K, tetragonal, I41/acd (142), Z = 8) were refined for all compounds except Ba14MnAs11: a = 16.688 (8) Å, c = 22.266 (9) Å (R = 5.82%, Rw = 6.95%, Ca14MnSb11); a = 17.511 (4), c = 23.321 (7) Å, (R = 4.07%, Rw = 3.93%, Sr14MnSb11); a = 18.394 (3), c = 24.069 (6) Å (R = 7.52%, Rw = 6.96%, Ba14MnSb11); a = 15.754 (3), c = 21.037 (7) Å (R = 4.09%, R2 = 8.82%, Ca14Mn As11); a = 16.576 (10), c = 22.167 (14) Å (R = 5.70%, Rw = 4.87%, Sr14MnAs11). These compounds are isostructural to the main-group Zintl compound Ca14AlSb11. Magnetization measurements performed on powder samples have shown that the antimony compounds are ferromagnets with ordering temperatures of 65 (Ca), 45 (Sr), and 20 K (Ba), whereas the arsenic compounds are paramagnetic down to 5 K. The temperature dependence of the resistivity of pressed pellets indicates that the Sb compounds may be metallic and the As compounds are semiconductors.
AB - The compounds A14MnPn11 (A = Ca, Sr, Ba; Pn = As, Sb), have been synthesized by reacting the elements in stoichiometric amounts in welded Nb tubes sealed in quartz ampules at high temperature (1250°C). Single-crystal X-ray data (130 K, tetragonal, I41/acd (142), Z = 8) were refined for all compounds except Ba14MnAs11: a = 16.688 (8) Å, c = 22.266 (9) Å (R = 5.82%, Rw = 6.95%, Ca14MnSb11); a = 17.511 (4), c = 23.321 (7) Å, (R = 4.07%, Rw = 3.93%, Sr14MnSb11); a = 18.394 (3), c = 24.069 (6) Å (R = 7.52%, Rw = 6.96%, Ba14MnSb11); a = 15.754 (3), c = 21.037 (7) Å (R = 4.09%, R2 = 8.82%, Ca14Mn As11); a = 16.576 (10), c = 22.167 (14) Å (R = 5.70%, Rw = 4.87%, Sr14MnAs11). These compounds are isostructural to the main-group Zintl compound Ca14AlSb11. Magnetization measurements performed on powder samples have shown that the antimony compounds are ferromagnets with ordering temperatures of 65 (Ca), 45 (Sr), and 20 K (Ba), whereas the arsenic compounds are paramagnetic down to 5 K. The temperature dependence of the resistivity of pressed pellets indicates that the Sb compounds may be metallic and the As compounds are semiconductors.
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M3 - Article
AN - SCOPUS:0003084925
VL - 6
SP - 93
EP - 99
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 1
ER -