hackmanite Min.
(ˈhækmənaɪt)
[ad. Sw. hackmanit (L. H. Borgström 1901, in Geol. Föreningens Stockholm Förh. XXIII. 563), f. the name of Victor A. Hackman (1866–1941), Finnish geologist: see -ite1.]
A pink or reddish violet variety of sodalite which loses its colour when exposed to daylight but regains it in the dark.
| 1903 Jrnl. Chem. Soc. LXXXIV. ii. 304 Hackmanite, a new member of the sodalite group. 1941 Amer. Mineralogist XXVI. 441 The induced color change of hackmanite when exposed to ultra-violet light was first observed..on hackmanite from Bancroft, Ontario, which changed from pink to a raspberry shade or deep violet on exposure to ultra-violet light. The induced color faded rapidly and nearly completely on exposure to strong light. 1970 Physics Bull. Nov. 487/1 Geologists had found that freshly cleared rocks of a naturally occurring form of sodalite, hackmanite, exhibited a pink colour. |