was then sealed in a 2mL quartz tube after being flushed with argon and evacuated. The 2mL quartz tube was then placed into a larger 5ml quartz tube and sealed after again being flushed with argon and evacuated. The double sealed quartz tube technique is employed because potassium attacks quartz. The sealed quartz tubes were placed in a furnace and heated from room temperature to 1040$^\circ$C over the course of 4 hours. After dwelling for 2 hours, the furnace was cooled to 850$^\circ$C. The quartz tube was then removed from the furnace, rotated 180$^\circ$C, and spun in a centrifuge for a few seconds to separate the self-flux from the single crystals. Crystals with dimensions up to approximately 3mm x 3mm x 50mm could readily be extracted from the crucible. The crystals have a platelike morphology, with the c-axis perpendicular to the plane. Two types of KFS were studied, one superconducting with TC onset of 32K and chemical composition as K$_{0.76}$Fe$_{1.72}$Se$_2$, and the other non-superconducting with composition as K$_{0.76}$Fe$_{1.78}$Se$_2$. Single crystals of RFS were grown as described elsewhere [@s1gooch]. Two types of RFS were studied: one superconducting with T$_C$ onset of 31K and chemical composition Rb$_{0.93}$Fe$_{1.70}$Se$_2$; and the other insulating with 