Wikipedia (manganese is a metal with important industrial metal alloy uses, particularly in stainless steels)
Electronic configuration: Mn 1s2 2s2 2p6 3s2 3p6 3d5 4s2 with 5 unpaired electrons, Mn2+ same as Mn minus 4s2 with 5 unparied d electrons
Magnetism: at rooom temperature χmolar = +511 10-6 emu/mol Ref.
Mn(IV) magnetic moment is (measured) approx. 3.9 BM.
Mn3O4, our measurements (IMFM, Ljubljana, 2011) on bulk sample: approx. paramagnetic down to 42 K with peff 5 BM. Transition to ferrimagnetic phase at 42 K:
AC, zfc-fc, and M(H).
Mn2O3 has two forms: alpha (AFM at approx 80 K) and gamma (Ferrimagnetic below 39 K). Reference: Kaist -Jo Euna.
Below 118 K MnO is antiferromagnetic. The first one magnetic stricture was determine by neutrons.(Wiki and tables)
MnO2 is antiferromagnetic below TN (92 K [59Y], 92...95 K [69R]) with a spin structure of the proper screw
type derived from neutron diffraction studies [59Y]. The spin structure is such that the spins all lie in the (001)
plane, but screw along the c axis with a pitch of 7/2 c (Fig. 2). The exchange integrals, defined in Fig. 1, have
(Ji/k in K)
J1 – 8.9 71O, J2 – 5.5, J3 1.3
Powder susceptibility: Fig. 3. The samples all showed Curie-Weiss behaviour above TN, but Theta values are very
scattered, 850...1300 K [71O].
59Y Yoshinori, A.: J. Phys. Soc. Jpn. 14 (1959) 807.
69R Rogers, D. B., Shannon, R. D., Sleight, AW., Gillson, J. L.: Inorg. Chem. 8 (1969) 841.
71O Ohama, N., Hamaguchi, Y.: J. Phys. Soc. Jpn. 30 (1971) 1311.
Antiferromagnet at 13 K: Dalton Trans., 2003, 2641-2645
Antiferromagnet with TN= 61 K: Journal of the Physical Society of Japan; ISSN:0031-9015; VOL.37; NO.4; PAGE.1169-1169; (1974)
Ferrimagnet with Tc = 630 K (Kittel, Solid state physics).
Ferrimagnet with Tc = 318 K (Kittel, Solid state physics).
Antiferromagnet with TN = 160 K (Kittel, Solid state physics).