TABLE 2.

Mössbauer parameters derived from the spectra shown in Fig. 4A^a

Strain	Spectral parameter for:												Iron contentb (%)	K	Iron contentc (% of dry wt)	Fe(II) (% of dry wt)	Fe(III) (% of dry wt)
	Component A, Fe(III)				Component B, Fe(II)				Component C, Fe(II)
	CS (mm/s)	QS (mm/s)	W (mm/s)	%	CS (mm/s)	QS (mm/s)	W (mm/s)	%	CS (mm/s)	QS (mm/s)	W (mm/s)	%
W3110	0.51	0.78	0.54	74	1.28	3.06	0.4	21	1.14	2.65	0.4	5	100	60	0.028	0.0073	0.021
JRG2951 (bfr)	0.51	0.78	0.54	73	1.28	3.06	0.4	21	1.14	2.65	0.4	6	98	60	0.024	0.0065	0.018
JRG2952 (ftnA)	0.48	0.97	0.54	56	1.28	3.06	0.4	28	1.14	2.65	0.4	16	58	60	0.015	0.0066	0.0084
JRG2953 (ftnA bfr)	0.48	0.97	0.54	55	1.28	3.06	0.4	35	1.14	2.65	0.4	10	55	60	0.016	0.0072	0.0088

^aAll center shift values (CS) are quoted relative to α-iron. Errors are typically ±0.01, although they may be larger for components B and C due to their partially resolved nature and low intensities. QS, quadrupole splitting; W, line width at half height. 

^bRelative total iron content derived from the Mössbauer data. 

^cDetermined by chemical analysis and quoted as a percentage of dry weight.