Ionic conductivity and crystallographic data for Na2-xCa1-xAlxSiO4 and Na2-xCaSi1-xPxO4 carnegieite phases期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Ionic conductivity and crystallographic data for Na_2-xCa_1-xAl_xSiO₄ and Na_2-xCaSi_1-xP_xO₄ carnegieite phases

Authors:	RD Shannon CM Foris JR Barkley

Affiliation:	Central Research and Development Department E. I. du Pont de Nemours and Company Experimental Station Wilmington, Delaware 19898 USA

Abstract:	Single crystals of Na₂CaSiO₄ prepared at 30 kbar and 1500°C are cubic with $a = 22.456 A ?$ . The polycrystalline compositions Na_1.9Ca_0.9Al_0.1SiO₄ and Na_1.8CaSi_0.8P_0.2O₄ can also be indexed using $a = 22.458 and 22.471 A ?$ , respectively. The Ca carnegieites Na₂CaSiO₄, Na_1.9Ca_0.9Al_0.1SiO₄, and Na_1.8CaSi_0.8P_0.2O₄ have Na ion conductivities of only 5?8 × 10^?6 (ω-cm)^?1 at 300°C.

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