Trace element partitioning between pyrochlore, microlite, fersmite and silicate melts

Table 2 Experimental conditions and run products

Run no	T/°C start	Cooling rate °/min	T/°C end	Duration (h) at T end	Starting material	Phases present
SE_Pyro2	1400	100	1300	24	SM_Pyro1	Fer, Nb-pyr, melt
SE_Pyro3	1400	20	1300	24	SM_Pyro1	Fer, Nb-pyr, melt
SE_Pyro5	1400	10	1260	24	SM_Pyro1	Fer, Nb-pyr, melt
SE_Pyro6	1400	5	1240	120	SM_Pyro1	Fer, Nb-pyr, melt
HW1	1400	0.1	1300	28	HWM	Ta-pyr, melt
HW2	1350	0.2	1200	20	HWM	Ta-pyr, melt
HW3	1400	–	1400	46	HWM	Ta-pyr, melt

Fer=Ca-Nb-fersmite; Nb-pyr=Ca-Nb-pyrochlore; melt=quenched melt; Ta-pyr=Ca-Ta-microlite
Note that in run HW3 no cooling rate was used. Note also that fersmite in runs SE_Pyro3, and pyrochlores in SE_Pyro2 were acicular and too small for EMPA analysis. All experiments were run in air and at atmospheric pressure. T/°C start: T at which the samples were inserted into the furnace, T/°C end: The temperature of the run after the cooling rate; cooling rate: The samples were cooled from T_start to T_end, and the runs were held at T_end for at least 20 h (duration (h) at T_end

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