hielmiten.
/ˈhjɛlmʌɪt/ Mineralogy.
A black stanno-tantalate of iron and other bases, found as a massive mineral.
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the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > oxides of titanium, tantalum, nickel, or rare earths > others
crichtonite1813
polymignite1826
warwickite1838
samarskite1849
adelpholite1859
guarinite1859
hielmite1861
tapiolite1868
sipylite1877
koppite1880
stibiotantalite1893
lewisite1895
mossite1898
neotantalite1903
priorite1907
arizonite1909
betafite1912
ampangabeite1913
ishikawaite1922
tanteuxenite1928
thoreaulite1934
simpsonite1937
priderite1951
irinite1955
obruchevite1955
lueshite1961
pseudo-ixiolite1963
wodginite1963
pseudorutile1966
armalcolite1970
1861 Amer. Jrnl. Sc. 3rd Ser. 31 362 Hjelmite..a new tantalate found at Kararfshol, in Sweden.
1868 J. D. Dana Syst. Mineral. (ed. 5) 519 Hielmite.
This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022).
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n.1861