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Pyrrhotite (nickeline: 1835) 2.CC.10 [1,044] [1,045] [1,046] (IUPAC:
heptairon octasulfide)
Qandilite (spinel, spinel: IMA1980-046) 4.BB.05 [1,047] [1...
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Xenophyllite (IMA2006-006) 8.AC.50 [349] [350] [no] (IUPAC:
tetrasodium heptairon hexaphosphate)
Xenotime (zircon) 8.AD.35 (IUPAC: REE phosphate) Xenotime-(Y)...
- heptahydrate)
Jedwabite (alloy: IMA1995-043) 1.AE.25 [103] [104] [105] (IUPAC:
heptairon tritantalum alloy)
Jeffbenite (IMA2014-097) 9.0 [106] [no] [no] (IUPAC:...