Table 1.

Experimental results at 7.5 GPa

Run n	t, °C	Time, h	Initial composition, wt %			Diamond nucleation	Mechanism Gr → Dm transformation	α Gr → Dm transformation, %	Diamond morphology	Metastable graphite
			KCl	K2CO3	H2O
550/2	1,800	10	100	—	—	—	—	0	—	—
555/2	1,800	15	100	—	—	—	—	0	—	—
548/2	1,800	20	100	—	—	+	FG	2	{111}	—
557/2	1,600	20	100	—	—	—	—	0	—	—
1043B	1,600	15	80	20	—	+	FG, TGG	100	{111}, {100}	—
1048B	1,600	15	50	50	—	+	FG, TGG	100	{111}, {100}	—
1043A	1,600	15	50	50	—	+	FG, TGG	100	{111}, {100}	—
1048A	1,600	15	25	75	—	+	FG, TGG	100	{111}, {100}	—
559/2	1,600	15	—	100	—	+	FG, TGG	100	{111}, {100}	—
1036A	1,550	15	—	100	—	+	FG, TGG	90	{111}, {100}	—
1036B	1,550	15	24	76	—	+	FG, TGG	80	{111}, {100}	—
1053A	1,500	15	—	100	—	+	FG, TGG	2	{111}, {100}	—
1053B	1,500	15	50	50	—	+	FG, TGG	1	{111}, {100}	—
1035A	1,400	15	–	100	—	—	—	—	—	+
1035B	1,400	15	30	70	—	—	—	—	—	+
1060B	1,600	15	—	81	19	+	TGG	6	{111}	—
1046B	1,600	15	—	65	35	+	TGG	100	{111}	—
1045B	1,600	15	—	37	63	+	TGG	100	{111}	—
1038B	1,500	15	—	83	17	+	TGG	<1	{111}	+
1054A	1,500	15	—	65	35	+	TGG	4–5	{111}	+
1038A	1,500	15	—	48	52	+	TGG	8	{111}	+
1062B	1,500	15	—	10	90	+	TGG	70	{111}	—
1042A	1,600	15	83	—	17	+	TGG	2	{111}	+
1060A	1,600	15	68	—	32	+	TGG	4	{111}	+
1046A	1,600	15	34	—	66	+	TGG	100	{111}	—
1042B	1,600	15	31	—	69	+	TGG	100	{111}	—
745/2	1,600	15	—	—	100	+	TGG	95	{111}	—
1058A	1,500	15	81	—	19	—	—	0	—	+
1054B	1,500	15	65	—	35	+	TGG	<1	{111}	+
1061A	1,500	15	53	—	47	+	TGG	4	{111}	+
1062A	1,500	15	9	—	91	+	TGG	70	{111}	+
1061B	1,500	15	—	—	100	+	TGG	60	{111}	—
1085B	1,500	15	40	36.5	23.5	+	TGG	<1	{111}	+
1086A	1,500	15	20.1	39.7	40.2	+	TGG	5	{111}	+
1086B	1,500	15	39.1	20.1	40.8	+	TGG	2	{111}	+

α is the degree of graphite-to-diamond transformation. α = M_Dm/(M_Dm+ M_Gr)100, where M_Dm is the mass of obtained diamond and M_Gr is the mass of residual graphite. Dm, diamond, Gr, graphite.