All search-match procedures use Diffrac-plus "Eva" with PDF2 set 
50 (release 2000).  Raw patterns were used directly (not DI files).


SMRR1
Result: siderite, quartz, hydroxylapatite, gormanite plus 
unidentified minor phase with broad peaks.


Quartz was recognised in the raw pattern by experience/intuition, 
and the raw pattern adjusted for sample displacement (`0.3mm, 
shame on you!) to fit the quartz peaks throughout the pattern.  
Without this adjustment, identification is not so obvious.


After that (see 2_SMRR1.gif) search-match was straight forward 
with reasonable fits from phases at the top of the list.


SMRR2
Result:  No direct match for pattern, but a near-match from 
20SiO2.2(C7H12NF).  Probably chemist's synthesis has different 
organic molecule?  Almost monophasic.


First attempt (see 2_SMRR2a.gif) shows no match, but near-match 
from the phase at top of list.


Cell parameters were "tuned" using Eva tool (see 2_SMRR2b.gif) to 
create a match indicating space group 87 is correct.  Pattern of 
intensities almost correct too.


Diffrac-plus "Metric" cell refinement programme used to show that 
all peaks are accounted for by SG87 except small peak at 21 
degrees - sample is not quite monophasic.


SMRR3
Result: Very doubtful match to thalidomide (see 2_SMRR3.gif).  
Only stoichiometry allows this as a "match".


Note that stoichiometry in PDF is given incorrectly.


SMRR4
Result: litharge, tetrabasic lead sulphate, tribasic lead sulphate, 
(possibly massicot and lead metal as well).


First attempt (see 2_SMRR4.gif) reveals litharge, tetrabasic lead 
sulphate and tribasic lead sulphate at or near the top of the list.


Massicot and lead metal are known to be possibilities in this 
system, but the evidence for these is ambiguous.  Hydrocerussite 
or plumbonacrite may be atmosphere reaction products (trace C in 
chemistry) but are not supported by diffraction evidence.