Home > Laskowski Ⅹ – April 6 > MS2010 Mcgovernite


Mcgovernite is a rare zinc manganese arsenite arsenate silicate. Palache & Bauer (1927) named the species in honor of Franklin miner and collector extraordinaire James McGovern (1861-1915). Wuensch (1960) found rhombohedral symmetry and especially large unit cell with c ~ 205 Å. Decades later, Hawthorne (2018) solved the crystal structure of mcgovernite, which consists of 84 polyhedral layers.

Mcgovernite forms red-brown scales with pearly luster, mostly covering one side of characteristic franklinite-willemite-calcite matrix. Minor pyrochroite and chlorophoenicite are associated on the fracture surface. From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona.

Price: $350

Item code: MS2010

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