Ussingite is a silicate mineral with formula Na₂AlSi₃O₈(OH).Handbook of Mineralogy (HOM - MSA) - Ussingite
/ref> It was named for Niels Viggo Ussing (1864–1911),

Copenhagen Copenhagen ( or .; da, København ) is the capital and most populous city of Denmark, with a proper population of around 815.000 in the last quarter of 2022; and some 1.370,000 in the urban area; and the wider Copenhagen metropolitan ar ...

Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Danish Realm, Kingdom of Denmark ...

References

Phyllosilicates Triclinic minerals Minerals in space group 2 {{silicate-mineral-stub