Unit cell determination of coexisting post-perovskite and H-phase in (Mg,Fe)SiO3 using multigrain XRD: compositional variation across a laser heating spot at 119 GPa

Progress in Earth and Planetary Science

Table 1 Unit cell parameters for Fe-depleted bridgmanite coexisting with H-phase at 102.5 GPa

Grain no.	N	a (Å)	σ (a)	b (Å)	σ (b)	c (Å)	σ (c)	V (Å³)	σ (V)
Group #1
12	39	4.6049	0.0006	6.3381	0.0018	4.3580	0.0008	127.19	0.03
17	30	4.6014	0.0019	6.3536	0.0010	4.3521	0.0010	127.24	0.04
32	38	4.6096	0.0009	6.3275	0.0012	4.3822	0.0011	127.82	0.03
35	38	4.6088	0.0014	6.3321	0.0013	4.3727	0.0006	127.61	0.02
43	36	4.6104	0.0008	6.3482	0.0011	4.3552	0.0011	127.47	0.03
Merged	181	4.6074	0.0004	6.3398	0.0005	4.3658	0.0004	127.52	0.01
Group #2
6	38	4.6021	0.0018	6.3459	0.0018	4.3713	0.0004	127.66	0.03
16	51	4.6413	0.0020	6.3345	0.0011	4.3629	0.0003	128.27	0.04
23	33	4.5927	0.0015	6.3876	0.0039	4.3607	0.0004	127.93	0.05
24	33	4.5966	0.0024	6.3271	0.0024	4.3732	0.0004	127.19	0.03
29	31	4.6130	0.0029	6.3361	0.0019	4.3619	0.0006	127.49	0.05
Merged	185	4.6063	0.0007	6.3391	0.0007	4.3655	0.0002	127.47	0.01
Group #3
33	28	4.6627	0.0066	6.3463	0.0008	4.3566	0.0005	128.92	0.17
36	30	4.5777	0.0027	6.3570	0.0017	4.3688	0.0005	127.13	0.05
41	33	4.5978	0.0011	6.4384	0.0061	4.3615	0.0004	129.11	0.10
46	27	4.5738	0.0027	6.3686	0.0024	4.3609	0.0005	127.03	0.05
51	18	4.6037	0.0010	6.3269	0.0017	4.3640	0.0018	127.11	0.04
1	23	4.5907	0.0024	6.3631	0.0013	4.3562	0.0011	127.25	0.04
Merged	158	4.6025	0.0005	6.3501	0.0005	4.3625	0.0002	127.50	0.01