Table S1.

Pore dimensions and layer widths used in the general model for relative density

Sample	dc, µm	db, inner, µm	db, outer, µm	wcribrum, µm	wareolae, µm	wbasal, µm	wrim, µm	ρrelative
1	0.34	0.80	1.47	0.42	2.66	0.62	0.29	0.401
2	0.34	0.82	1.37	0.26	2.97	0.41	0.19	0.314
3	0.35	0.89	1.49	0.36	2.67	0.48	0.28	0.369
4	0.27	0.90	1.43	0.31	1.94	0.32	0.20	0.373
5	0.30	0.70	1.33	0.38	2.49	0.35	0.21	0.360