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MINERAL CLASSIFICATION / SYSTEMATIK der MINERALE
based on E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001),
revised by Thomas Witzke (2022)
3. HALIDES
(Fluorides, Chlorides, Bromides, Iodides)
3.A: Simple Halides, without H2O
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3.AA. Simple Halides, M : X = 1 : 1, 2 : 3 and related ratios
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3.AA.005. Nantokite group |
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Nantokite | |
CuCl | |
cub., F43m | |
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G |
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Marshite | |
CuI | |
cub., F43m | |
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G |
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Miersite | |
AgI | |
cub., F43m | |
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G |
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3.AA.010. Iodargyrite |
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Iodargyrite | |
AgI | |
hex., P63/mc | |
FOTO | |
A |
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Tocornalite | |
(Ag,Hg)I | |
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Q |
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The existence of Tocornalite as a mineral is very questionable.
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3.AA.015. Chlorargyrite group |
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Chlorargyrite | |
AgCl | |
cub., Fm3m | |
FOTO | |
A |
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Bromargyrite | |
AgBr | |
cub., Fm3m | |
FOTO | |
A |
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3.AA.020. Halite group |
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Griceite | |
LiF | |
cub., Fm3m | |
FOTO | |
IMA 1986-043 |
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Villiaumite | |
NaF | |
cub., Fm3m | |
FOTO | |
G |
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Carobbiite | |
KF | |
cub., Fm3m | |
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G |
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Halite | |
NaCl | |
cub., Fm3m | |
FOTO | |
G |
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Sylvite | |
KCl | |
cub., Fm3m | |
FOTO | |
G |
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3.AA.025. Salammoniac group |
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Salammoniac / Salmiak | |
NH4Cl | |
cub., Pm3m | |
FOTO | |
G |
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Lafossaite | |
TlCl | |
cub., Pm3m | |
FOTO | |
IMA 2003-043 |
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3.AA.030. Nataliyamalikite |
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Nataliyamalikite | |
TlI | |
orth., Cmcm | |
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IMA 2016-022 |
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3.AA.035. Calomel group |
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Calomel | |
HgCl | |
tetr., I4/mmm | |
FOTO | |
G |
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Kuzminite | |
HgBr | |
tetr., I4/mmm | |
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IMA 1986-005 |
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Moschelite | |
HgI | |
tetr., I4/mmm | |
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IMA 1987-038 |
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3.AA.040. Brontesite |
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Brontesite | |
(NH4)3PbCl5 | |
orth., Pnma | |
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IMA 2008-039 |
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3.AA.045. Flinteite |
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Flinteite | |
K2ZnCl4 | |
orth., Pna21 | |
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IMA 2014-009 |
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3.AA.050. Pseudocotunnite |
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Pseudocotunnite | |
K2PbCl4 (?) | |
orth. | |
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Q |
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3.AA.055. Mellizinkalite |
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Mellizinkalite | |
K3Zn2Cl7 | |
tric., P1 | |
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IMA 2014-010 |
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3.AA.060. Neighborite group [Perovskite supergroup, Single Perovskites ABX3, Neighborite subgroup] |
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Neighborite | |
NaMgF3 | |
orth., Pcmn | |
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A |
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Parascandolaite | |
KMgF3 | |
cub., Pm3m | |
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IMA 2013-092 |
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3.AA.065. Chlorocalcite [Perovskite supergroup, Single Perovskites ABX3, Chlorocalcite subgroup] |
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Chlorocalcite | |
KCaCl3 | |
orth., Pnma | |
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G |
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3.AA.070. Javorieite |
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Javorieite | |
KFeCl3 | |
orth., Pnma | |
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IMA 2016-020 |
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3.AA.075. Sanguite |
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Sanguite | |
KCuCl3 | |
mon., P21/c | |
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IMA 2013-002 |
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3.AA.080. Challacolloite group |
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Challacolloite | |
KPb2Cl5 | |
mon., P21/c | |
FOTO | |
IMA 2004-028 |
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Hephaistosite | |
TlPb2Cl5 | |
mon., P21/c | |
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IMA 2006-043 |
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3.AB. Simple Halides, M : X = 1 : 2 |
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3.AB.005. Sellaite |
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Sellaite | |
MgF2 | |
tetr., P42/mnm | |
FOTO | |
G |
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3.AB.010. Lawrencite group |
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Chloromagnesite | |
MgCl2 | |
trig., R3m | |
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Q |
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Lawrencite | |
FeCl2 | |
trig., R3m | |
FOTO | |
G |
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Scacchite | |
MnCl2 | |
trig., R3m | |
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G |
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The existence of chloromagnesite as a mineral is very questionable.
Scacchite needs confirmation too.
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3.AB.015. Tolbachite |
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Tolbachite | |
CuCl2 | |
mon., C2/m | |
FOTO | |
IMA 1982-067 |
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3.AB.020. Fluorite group |
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Fluorite | |
CaF2 | |
cub., Fm3m | |
FOTO | |
G |
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Strontiofluorite | |
SrF2 | |
cub., Fm3m | |
FOTO | |
IMA 2009-014 |
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Frankdicksonite | |
BaF2 | |
cub., Fm3m | |
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IMA 1974-015 |
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Fluorocronite | |
PbF2 | |
cub., Fm3m | |
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IMA 2010-023 |
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3.AB.025. Tveitite |
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Tveitite-(Y) | |
Ca14Y5F43 | |
trig., R3 | |
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IMA 1975-033 |
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3.AB.030. Gagarinite group |
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Gagarinite-(Y) | |
NaCaYF6 | |
hex., P63/m | |
FOTO | |
A |
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Gagarinite-(Ce) | |
NaCaCeF6 | |
trig. | |
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IMA 1993-038, Rn, Rd |
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Polezhaevaite-(Ce) | |
NaSrCeF6 | |
hex., P63/m | |
FOTO | |
IMA 2009-015 |
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Gagarinite-(Ce) was originally described as zajacite-(Ce), renamed in 2010.
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3.AB.035. Coccinite |
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Coccinite | |
HgI2 | |
tetr., P42/nmc | |
FOTO | |
G |
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3.AB.040. Cotunnite |
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Cotunnite | |
PbCl2 | |
orth., Pnam | |
FOTO | |
G |
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3.AB.045. Matlockite group |
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Rorisite | |
CaFCl | |
tetr., P4/nmm | |
FOTO | |
IMA 1989-015 |
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Zhangpeishanite | |
BaFCl | |
tetr., P4/nmm | |
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IMA 2006-045 |
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Matlockite | |
PbFCl | |
tetr., P4/nmm | |
FOTO | |
G |
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Isostructural with the Bismoclite group (3.DD.15.).
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3.AB.050. Laurelite |
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Laurelite | |
Pb7F12Cl2 | |
hex., P6 | |
FOTO | |
IMA 1988-020a |
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The crystal structure of Laurelite is related to the structure of orthorhombic α-PbF2.
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3.AC. Simple Halides, M : X = 1 : 3 |
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3.AC.005. Molysite |
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Molysite | |
FeCl3 | |
trig., R3 | |
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G |
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3.AC.010. Oskarssonite group [Perovskite supergroup, B site vacant Perovskites, Oskarssonite subgroup] |
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| 010 a. Oskarssonite |
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Oskarssonite | |
AlF3 | |
trig., R3c | |
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IMA 2012-088 |
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| 010 b. Waimirite-(Y) |
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Waimirite-(Y) | |
YF3 | |
orth., Pnma | |
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IMA 2013-108 |
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3.AC.015. Fluocerite group |
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Fluocerite-(Ce) | |
CeF3 | |
trig., P3c1 | |
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A |
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Fluocerite-(La) | |
LaF3 | |
trig., P3c1 | |
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A |
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3.AC.020. Gananit |
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Gananite | |
BiF3 | |
cub., P43m | |
FOTO | |
IMA 1983-006 |
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G = Grandfathered minerals: original description preceded the establishment of the CNMNC in 1959, and
generally regarded as a valid species
A or IMA No. = Minerals approved by the CNMNC
Rd = Redefinition of the mineral approved by the CNMNC
Rn = Renamed with approval by the CNMNC
Q = Questionable mineral
Classification principles:
Subdivision of the Halides subclass 3.A: Simple Halides, without water into
3.AA. Simple Halides, M : X = 1 : 1, 2 : 3 and related ratios; 3.AB.
Simple Halides, M : X = 1 : 2; 3.AC. Simple Halides, M : X = 1 : 3 from Strunz 9 is retained.
Further classification:
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3.AA.: Simple Halides, M : X = 1 : 1, 2 : 3 and related ratios :
From M:X = 1:1 to 1:1.67 (=3:5) with increasing halide content, followed by Te containing
halides with unknown structures. Within 1:1 ratio sorted roughly from medium-sized to large cations.
3.AB.: Simple Halides, M : X = 1 : 2 :
Sorted from medium-sized to large cations.
3.AC.: Simple Halides, M : X = 1 : 3 :
Sorted from medium-sized to large cations.
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To distinguish from classical Strunz numbering, on hierarchical "group" level, a numbering with 3 digits is used,
like "3.AA.005. Nantokite group", instead of 2 digits (like "3.AA.05.") in the Strunz system.
© Thomas Witzke (2023)
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