• Current regulations do not allow a new mineral name to honour a person a second time. But there are exceptions:
Jöns Jakob Berzelius (1779–1848) (
berzelianite,
berzeliite and berzeline (now
haüyne));
Pierre Berthier (1782–1861) (
berthierine and
berthierite);
Andor von Semsey (1833–1923) (
andorite IV, andorite VI and
semseyite);
Brian Harold Mason (1917–2009) (
brianite and
stenhuggarite);
Caleb Wroe Wolfe (1908–1980) (
wolfeite and
wroewolfeite) and
Leo Neal Yedlin (1908–1977) (
yedlinite and
nealite). The regulation does not affect mineral series and other variations (prefix iso, hexa, ortho, tetra, clino, meta, para, pseudo etc.). For instance:
Karl Hugo Strunz (1910–2006) (
strunzite group);
George P. Merrill (1854–1929) (
merrillite series,
whitlockite group);
Edward S. Grew (Ph.D. 1971) (
edgrewite series,
humite group). •
Standard temperature and pressure (STP). •
Silicate perovskites,
argentite and β-quartz are not valid minerals, as they do not occur on Earth's surface (STP). The type material of
bridgmanite is from a meteorite. Some minerals are unstable on Earth's surface (
metastability):
diamonds,
cohenite and
haxonite, for instance.
Acanthite var. argentite (a
pseudomorph after argentite) and β-quartz pseudomorphs are sometimes sold. •
Ramdohr (1936) discovered that the
type material of
schapbachite (Ag0.4Pb0.2Bi0.4S) was a mixture of
galena (PbS) and
matildite (AgBiS2). It was discredited (1982) as it was found unstable at 'standard temperature and pressure' (STP). It was revalidated (2004) as Pb-bearing schabachite is stable at STP. The
type locality is not Schapbach now, but Silberbrünnle mine, Gengenbach; both
Black Forest localities. •
Epsilon iron,
hexagonal close-packed (HCP) phase of iron is stable only at extremely high pressure. It can be found as a mineral (chemical formula: ). • It is not only schapbachite that had a longer controversy. Other minerals have a complicated history, as well. •
Imogolite, 9.ED.20, was first published 1962. Its formal discreditation by the IMA was published 1967, as its description was incomplete. The IMA referred it to the AIPEA (''Association Internationale Pour l'Étude des Argiles'') for advice and it was approved by the AIPEA (Nomenclature Committee) at its Tokyo meeting (1970). Fleischer (1983) described it as a variety of
allophane and it was finally redefined and approved by the IMA/CNMNC 1986. • Amorphous allophane,
nanotube-like imogolite (),
halloysite-10Å (), halloysite-7Å () and
gibbsite () are thought to be products of
tuff weathering. •
Betalommosovite was described by Gerasimovskiy and Kazakova (1962) and discredited by the IMA-CNMMN (IMA1967 s.p.). It was published without approval and listed as discredited on the 'IMA/CNMNC List of Mineral Names' (2009). Later, betalomonosovite was revalidated (IMA2014-J). •
Jichengite as xinghuaite (IMA1984-047) was rejected by the IMA-CNMMN. Jichengite (IMA1994-039) was rejected by the IMA-CNMMN, as well. Unfortunately, it was published without approval in 2011. • UM1991-//-COF:BaCaCe (IMA1989-012), a calcium analogue of
cordylite-(Ce) from Bayan Obo mine, had the approval procedure suspended by
Joseph A. Mandarino, because of the cerium dominant cordylite (IMA2000-C). • Other curiosities: •
Niggliite (former 1.AG.60, year: 1938),
sorosite (former 1.AC.15, IMA1994-047),
yuanjiangite (former 1.AC.15, IMA1993-028) are not classified as tin alloys (PGE-metal alloys and indium-tin family) in ''Fleischer's Glossary''. But, they are stannide minerals (nickeline mineral group), sulfide mineral class there. •
Tiragalloite (9.BJ.25, IMA1969-061, ), is an arsenosilicate and
grenmarite (9.BE.25, IMA2003-024, ) is a zirconium silicate (analogous to the more common
aluminosilicates, borosilicates and titanium silicates). • Mostly anthropogenic minerals:
abhurite (3.DA.30),
lausenite (7.CB.70),
guildite (7.DC.30),
hoelite (10.CA.15),
calclacite (10.AA.25). •
Studtite (4.GA.15, year: 1947) is the first peroxide mineral, the
facies radioactivity generate peroxide. •
Ianthinite (4.GA.10, year: 1926),
U(IV) is one of the constituents of the mineral), it gets a layer of
schoepite/
metaschoepite in the presence of oxygen. •
Polyoxometalates: •
Menezesite (4.FN.05, IMA2005-023) and
aspedamite (IMA2011-056), are the only natural heteropolyniobates known. •
Ophirite (IMA2013-017) is a mineral with a heteropolytungstate tri-lacunary
keggin anion. •
Melcherite (IMA2015-018) and
peterandresenite (IMA2012-084) have a lindqvist anion. • Inosilicate, biopyriboles: •
Jimthompsonite (IMA1977-011) is a triple chain inosilicate. •
Chesterite (IMA1977-010) is a connected double chain inosilicate. • Inosilicate, double dreier chains: •
Xonotlite (Y: 1866) is an inosilicate with double dreier chains. •
Chivruaiite (IMA2004-052) is an inosilicate double dreier chains of (SiO4) tetrahedra. •
Zorite (IMA1972-011) is an inosilicate double dreier chains of (SiO4) tetrahedra. •
Haineaultite (IMA1997-015) is an inosilicate double dreier chains of (SiO4) tetrahedra. • Other inosilicates: •
Veblenite (IMA2010-050) has a veblenite ribbon (Si8O22). •
Yangite (IMA2012-052) is an inosilicate with two-connected double chain. •
Yegorovite (IMA2008-033) is an inosilicate with single zig-zag chains of Si tetrahedra. •
Icosahedrite (IMA2010-042), the only natural quasicrystal known. •
Comancheite (IMA2013-B/ IMA1980-077, former 3.DD.65) is a mercury nitride mineral now. • α-
Sulfur (old); chemical formula unit with 1 atom; unit cell with 128 formula units (Z). •
Whitecapsite (IMA2012-030), chemical formula: H16Fe2+5Fe3+14Sb3+6(AsO4)18O16·120H2O; unit cell with 1 formula unit (Z). •
Megacyclite (9.CP.10, IMA1991-015); chemical formula unit with 111 atoms; unit cell with 4 formula units (Z). •
Labyrinthite (9.CO.10, IMA2002-065); chemical formula unit with 278.5 atoms; unit cell with 3 formula units (Z). •
Ashcroftine-(Y) (9.DN.15, year: 1933); chemical formula unit with 180 atoms; unit cell with 4 formula units (Z). == Notes ==