Table 1.

Chemical properties of Fe, Ga, Tc and In.

	Iron	Gallium		Technetium	Indium
Atomic number	26	31		43	49
Ionic radius [pm]	64	62		136	80
Oxidation state	III	III		I, III, IV, V, VII	III
Coordination number	6	4, 5, 6		5, 6, 7	6, 7, 8
Complex geometry	Octahedral	Octahedral		Octahedral, trigonal bipyramid, square pyramidal	Octahedral, square antiprismatic
Radionuclide	•	67Ga	68Ga	99mTc	111In
Diagnostic mode	•	SPECT	PET	SPECT	SPECT
Half-life	•	3.56 d	1.13 h	6.02 h	2.83 d
Source	•	Cyclotron	Generator	Generator	Cyclotron