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Melanotekite

A valid IMA mineral species - grandfathered
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09781290014977568878126.jpg
Melanotekite

Su Elzu, Ozieri, Sassari Province, Sardinia, Italy
08262840015460260295141.jpg
Melanotekite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
06849870015460258707269.jpg
Melanotekite

Rex mine, Hillsboro Mining District, Sierra County, New Mexico, USA
04332390014991390622429.jpg
Melanotekite

Su Elzu, Ozieri, Sassari Province, Sardinia, Italy
03010170015459336667360.jpg
Melanotekite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
03671280015296227513685.jpg
Melanotekite

Rex mine, Hillsboro Mining District, Sierra County, New Mexico, USA
09781290014977568878126.jpg
Melanotekite

Su Elzu, Ozieri, Sassari Province, Sardinia, Italy
08262840015460260295141.jpg
Melanotekite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
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About MelanotekiteHide

Formula:
Pb2Fe3+2(Si2O7)O2
Colour:
Black, dark gray, blackish green
Lustre:
Greasy, Metallic, Sub-Metallic
Hardness:
6½
Specific Gravity:
5.73 - 6.28
Crystal System:
Orthorhombic
Name:
From the Greek μελανός for "black" and τήκεσθαι, "to melt", in allusion to its appearence.
Kentrolite-Melanotekite Series.

A synthetic aluminium analogue is known.


Unique IdentifiersHide

Mindat ID:
2632
Long-form identifier:
mindat:1:1:2632:7
GUID
(UUID V4):
d06bcfa9-8956-440e-834b-fbb8b7eddd6b

IMA Classification of MelanotekiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Pb2Fe3+2O2(Si2O7)

Classification of MelanotekiteHide

Strunz-mindat (2024):
9.BE.80

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
Dana 8th ed.:
56.2.10.1

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Hey's CIM Ref.:
14.13.9

14 : Silicates not Containing Aluminum
13 : Silicates of Pb

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
MtkIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
MtkThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of MelanotekiteHide

Lustre:
Greasy, Metallic, Sub-Metallic
Transparency:
Translucent
Colour:
Black, dark gray, blackish green
Streak:
Grayish-black
Hardness:
6½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Very Good
Two cleavages are known, but without reported miller indices.
Density:
5.73 - 6.28 g/cm3 (Measured)    6.30 g/cm3 (Calculated)

Optical Data of MelanotekiteHide

Type:
Biaxial (+)
RI values:
nα = 2.120 nβ = 2.170 nγ = 2.310
Birefringence:
0.05
Max Birefringence:
δ = 0.190
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v
Optical Extinction:
Parallel
Pleochroism:
Visible
Comments:
Dark green to red brown. Translucent in thin section.

Chemistry of MelanotekiteHide

Mindat Formula:
Pb2Fe3+2(Si2O7)O2
Elements listed:
Fe, O, Pb, Si - search for minerals with similar chemistry
Common Impurities:
Ti,Al,Mn,Mg

Crystallography of MelanotekiteHide

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
C2 2 21
Setting:
C2 2 21
Cell Parameters:
a = 6.93 Å, b = 10.98 Å, c = 10.06 Å
Ratio:
a:b:c = 0.631 : 1 : 0.916
Unit Cell V:
765.48 ų (Calculated from Unit Cell)
Z:
4

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004535MelanotekiteDorsam G, Liebscher A, Wunder B, Franz G (2008) Crystal structures of synthetic melanotekite (Pb2Fe2Si2O9), kentrolite (Pb2Mn2Si2O9), and the aluminum analogue (Pb2Al2Si2O9) American Mineralogist 93 573-5832008synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.523 Å(80)
5.032 Å(60)
3.718 Å(60)
3.489 Å(80)
3.252 Å(80)
3.095 Å(30)
2.951 Å(30)
2.914 Å(100)
2.862 Å(60)
2.732 Å(100)
2.658 Å(30)
2.554 Å(30)
2.512 Å(30)
2.417 Å(10)
2.333 Å(30)
2.129 Å(30)
2.102 Å(45)
1.940 Å(60)
1.904 Å(60)
1.885 Å(30)
1.831 Å(30)
1.818 Å(30)
1.749 Å(30)
1.699 Å(10)
Comments:
ICDD 15-633 (natural), 20-585 (synthetic)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits
Stage 7: Great Oxidation Event<2.4
47e : [Vanadates, chromates, manganates]
47h : [Near-surface oxidized, dehydrated minerals]

Type Occurrence of MelanotekiteHide

Synonyms of MelanotekiteHide

Other Language Names for MelanotekiteHide

Relationship of Melanotekite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
21 photos of Melanotekite associated with AlamositePbSiO3
8 photos of Melanotekite associated with PhlogopiteKMg3(AlSi3O10)(OH)2
8 photos of Melanotekite associated with LeadPb
7 photos of Melanotekite associated with CymriteBaAl2Si2(O,OH)8 · H2O
7 photos of Melanotekite associated with RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
7 photos of Melanotekite associated with AndraditeCa3Fe3+2(SiO4)3
7 photos of Melanotekite associated with LeadhillitePb4(CO3)2(SO4)(OH)2
7 photos of Melanotekite associated with KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8
6 photos of Melanotekite associated with CelsianBa(Al2Si2O8)
6 photos of Melanotekite associated with ManganophylliteK(Fe,Mg,Mn)3AlSi3O10(OH)2

Related Minerals - Strunz-mindat GroupingHide

9.BE.ParalomonosoviteNa6◻4Ti4(Si2O7)2[PO3OH][PO2(OH)2]O2(OF)Tric. 1 : P1
9.BE.CámaraiteBa3Na(Fe2+,Mn)8Ti4(Si2O7)4O4(OH,F)7Tric. 1
9.BE.Christofschäferite-(Ce)Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8 Mon. 2/m : P21/m
9.BE.BobshannoniteNa2KBa(Mn,Na)8(Nb,Ti)4(Si2O7)4O4(OH)4(O,F)2Tric.
9.BE.Calciomurmanite(Na,◻)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4Tric. 1 : P1
9.BE.Batievaite-(Y)Y2Ca2Ti(Si2O7)2(OH)2(H2O)4Tric. 1 : P1
9.BE.Delhuyarite-(Ce)Ce4Mg(Fe3+,W)3◻(Si2O7)2O6(OH)2Mon. 2/m : B2/m
9.BE.XAsimowiteFe2+4O(Si2O7)Orth. mmm (2/m 2/m 2/m) : Imma
9.BE.MoxuanxueiteNaCa6Zr(Si2O7)2OF3Tric. 1 : P1
9.BE.Alexkuznetsovite-(Ce)Ce2Mn(CO3)(Si2O7)Mon. 2/m : P21/b
9.BE.Biraite-(La)La2Fe2+(CO3)(Si2O7)Mon. 2/m : P21/b
9.BE.ZinkgruvaniteBa4Mn2+4Fe3+2(Si2O7)2(SO4)2O2(OH)2Tric. 1 : P1
9.BE.MadeiraiteNa2Ca2Fe2Zr2(Si2O7)2O2F2Mon. 2/m : P21/b
9.BE.BortolaniteCa2(Ca1.5Zr0.5)Na(NaCa)Ti(Si2O7)2(OF)F2Tric. 1 : P1
9.BE.Nacareniobsite-(Y)Na3Ca3YNb(Si2O7)2OF3Mon. 2/m : P21/b
9.BE.PilanesbergiteNa2Ca2Fe2Ti2(Si2O7)2O2F2Mon. 2/m : P21/b
9.BE.AlfredcaspariteSr2TiO(Si2O7)Tet. 4mm : P4bm
9.BE.02WadsleyiteMg4O(Si2O7)Orth. mmm (2/m 2/m 2/m) : Imma
9.BE.05HennomartiniteSrMn3+2(Si2O7)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.05LawsoniteCaAl2(Si2O7)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.05NoelbensoniteBaMn3+2(Si2O7)(OH)2 · H2OOrth. mm2
9.BE.05ItoigawaiteSrAl2(Si2O7)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.05CortesognoiteCaV2(Si2O7)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.07IlvaiteCaFe3+Fe2+2(Si2O7)O(OH)Orth. mmm (2/m 2/m 2/m)
9.BE.07ManganilvaiteCaFe2+Fe3+Mn2+(Si2O7)O(OH)Mon. 2/m : P21/b
9.BE.07Amamoorite CaMn2+2Mn3+(Si2O7)O(OH)Mon. 2/m : P21/b
9.BE.10SuoluniteCa2(H2Si2O7) · H2OOrth. mm2 : Fdd2
9.BE.12JaffeiteCa6(Si2O7)(OH)6Trig. 3 : P3
9.BE.15FresnoiteBa2Ti(Si2O7)OTet. 4mm : P4bm
9.BE.17BaghdaditeCa6Zr2(Si2O7)2O4Mon. 2/m : P21/b
9.BE.17BurpaliteNa2CaZr(Si2O7)F2Mon. 2/m : P21/b
9.BE.17CuspidineCa8(Si2O7)2F4Mon. 2/m : P21/b
9.BE.17HiortdahliteNa2Ca4(Ca0.5Zr0.5)Zr(Si2O7)2OF3Tric. 1 : P1
9.BE.17Janhaugite(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2Mon. 2/m : P21/m
9.BE.17LåveniteNa2Ca2Mn2Zr2(Si2O7)2O2F2Mon. 2/m : P21/b
9.BE.17Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2Mon. m
9.BE.17NormanditeNaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OFMon. 2/m : P21/b
9.BE.17WöhleriteNa2Ca4ZrNb(Si2O7)2O3FMon. 2 : P21
9.BE.20Mosandrite-(Ce)(Ca3REE)[(H2O)2Ca0.5◻0.5]Ti(Si2O7)2(OH)2(H2O)2Mon. 2/m : P21/b
9.BE.20Nacareniobsite-(Ce)Na3Ca3(Ce,REE)Nb(Si2O7)2OF3Mon. 2/m : P21/b
9.BE.20Roumaite(Ca,Na,REE,◻)7(Nb,Ti)[Si2O7]2OF3Mon. m : Bb
9.BE.20Rinkite-(Y)Na2Ca4YTi(Si2O7)2OF3Mon. 2/m : P21/b
9.BE.22GötzeniteNaCa6Ti(Si2O7)2OF3Tric. 1 : P1
9.BE.22Hainite-(Y)Na2Ca4(Y,REE)Ti(Si2O7)2OF3Tric. 1 : P1
9.BE.22RosenbuschiteNa6Ca6Zr3Ti(Si2O7)4O2F6Tric. 1 : P1
9.BE.22KochiteNa3Ca2MnZrTi(Si2O7)2OF3Tric. 1 : P1
9.BE.22Fogoite-(Y)Na3Ca2Y2Ti(Si2O7)2OF3Tric. 1 : P1
9.BE.23DovyreniteCa6Zr(Si2O7)2(OH)4Orth. mmm (2/m 2/m 2/m) : Pnnm
9.BE.25Barytolamprophyllite(Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F)Mon.
9.BE.25EricssoniteBaMn2+2Fe3+(Si2O7)O(OH)Mon. 2/m : B2/m
9.BE.25Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2Mon. 2/m
9.BE.25Ericssonite-2OBaMn2+2Fe3+(Si2O7)O(OH)Orth.
9.BE.25SeidozeriteNa4MnZr2Ti(Si2O7)2O2F2Mon. 2/m : P2/b
9.BE.25Nabalamprophyllite(BaNa)Ti2Na3Ti(Si2O7)2O2(OH)2Mon. 2/m : P2/m
9.BE.25GrenmariteNa4MnZr3(Si2O7)2O2F2Mon. 2/m : P2/b
9.BE.25SchülleriteBa2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4Tric. 1 : P1
9.BE.25KazanskyiteBaNa3Ti2Nb(Si2O7)2O2(OH)2(H2O)4Tric. 1 : P1
9.BE.25LileyiteBa2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2Mon. 2/m : B2/m
9.BE.25EmmerichiteBa2Na(Na,Fe2+)2(Fe3+,Mg)Ti2(Si2O7)2O2F2Mon. 2/m : B2/m
9.BE.25SaamiteBa◻Na3Ti2Nb(Si2O7)2O2(OH)F(H2O)2Tric. 1 : P1
9.BE.25FluorlamprophylliteNa3(SrNa)Ti3(Si2O7)2O2F2Mon. 2/m : B2/m
9.BE.25Fluorbarytolamprophyllite(Ba,Sr)2[(Na,Fe2+)3(Ti,Mg)F2][Ti2(Si2O7)2O2]Mon. 2/m : B2/m
9.BE.27MurmaniteNa2Ti2(Si2O7)O2 · 2H2OTric. 1 : P1
9.BE.27VigrishiniteNaZnTi4(Si2O7)2O3(OH)(H2O)4Tric. 1 : P1
9.BE.27KolskyiteCaNa2Ti4(Si2O7)2O4(H2O)7Tric. 1 : P1
9.BE.27SelivanovaiteNaFe3+Ti4(Si2O7)2O4(H2O)4Tric. 1 : P1
9.BE.30Epistolite(Na◻)Nb2Na3Ti(Si2O7)2O2(OH)2(H2O)4Tric. 1 : P1
9.BE.32LomonosoviteNa5Ti2(Si2O7)(PO4)O2Tric. 1 : P1
9.BE.35VuonnemiteNa11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH)Tric.
9.BE.37SoboleviteNa13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3Mon. m : Pb
9.BE.40Innelite Ba4Ti2Na(NaMn2+)Ti(Si2O7)2[(SO4)(PO4)]O2[O(OH)]Tric. 1 : P1
9.BE.40PhosphoinneliteNa3Ba4Ti3(Si2O7)2(PO4,SO4)2O2FTric.
9.BE.42YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)Tric. 1 : P1
9.BE.45QuadruphiteNa6Na2(CaNa)2Na2Ti2Na2Ti2(Si2O7)2(PO4)4O4F2Tric. 1 : P1
9.BE.47PolyphiteNa5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2Tric. 1 : P1
9.BE.50BornemaniteNa6BaTi2Nb(Si2O7)2(PO4)O2(OH)F Tric. 1 : P1
9.BE.50Shkatulkalite Na2Nb2Na3Ti(Si2O7)2O2(FO)(H2O)4(H2O)3Tric. 1 : P1
9.BE.55BafertisiteBa2Fe2+4Ti2(Si2O7)2O2(OH)2F2Tric.
9.BE.55HejtmaniteBa2Mn2+4Ti2(Si2O7)2O2(OH)2F2Tric. 1
9.BE.55Bykovaite(Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2OMon. 2/m
9.BE.55Nechelyustovite(Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2OMon. 2/m : B2/m
9.BE.60Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2OMon. 2/m : B2/m
9.BE.62Orthochevkinite(Ce,La,Ca,Na,Th)4(Fe2+,Mg)2(Ti,Fe3+)3Si4O22Orth.
9.BE.62 vaStrontium Perrierite(Ce,Sr,La,Ca)4Fe2+(Ti,Zr,Fe)2Ti2(Si2O7)2O8
9.BE.62Chevkinite-(Nd)(Nd,REE)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8 ?
9.BE.62Perrierite-(Nd)Nd4MgFe3+2Ti2(Si2O7)2O8 ?
9.BE.65BusseniteNa2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3FTric. 1 : P1
9.BE.67JinshajiangiteBaNaFe2+4Ti2(Si2O7)2O2(OH)2FTric. 1 : P1
9.BE.67PerraultiteBaNaMn2+4Ti2(Si2O7)2O2(OH)2FTric. 1
9.BE.70Karnasurtite-(Ce)(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2OAmor.
9.BE.70Perrierite-(Ce)Ce4MgFe3+2Ti2(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70Strontiochevkinite(Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70Chevkinite-(Ce)Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2Mon. 2/m : P21/b
9.BE.70Polyakovite-(Ce)(Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8Mon. 2/m : B2/m
9.BE.70RengeiteSr4ZrTi4(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70MatsubaraiteSr4Ti5(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70Dingdaohengite-(Ce)(Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe2+)2Ti2(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70Maoniupingite-(Ce)(Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8Mon. 2/m : B2/m
9.BE.70Perrierite-(La)(La,Ce,Ca)4(Fe2+,Mn)(Ti,Fe3+,Al)4[(Si2O7)O4]2Mon. 2/m : P21/b
9.BE.70UM2008-53-SiO:SrTiZrSr4ZrTi4(Si2O7)2O8Orth. mmm (2/m 2/m 2/m) : Pbca
9.BE.70Hezuolinite(Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8Mon. 2/m : B2/m
9.BE.72FersmaniteCa4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3Tric.
9.BE.75BelkoviteBa3(Nb,Ti)6(Si2O7)2O12Hex. 6 m2 : P62m
9.BE.77NasonitePb6Ca4(Si2O7)3Cl2Hex. 6/m : P63/m
9.BE.80KentrolitePb2Mn3+2(Si2O7)O2Orth. mmm (2/m 2/m 2/m) : Pbcm
9.BE.82TilleyiteCa5(Si2O7)(CO3)2Mon. 2/m : P21/b
9.BE.82Alexkuznetsovite-(La)La2Mn(CO3)(Si2O7)Mon. 2/m : P21/b
9.BE.85KillalaiteCa6.4(H0.6Si2O7)2(OH)2Mon. 2/m : P21/m
9.BE.87Stavelotite-(La)(La,Nd,Ca)3Mn2+3Cu(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30Trig. 3 : P31
9.BE.90Biraite-(Ce)Ce2Fe2+(Si2O7)(CO3)Mon. 2/m : P21/b
9.BE.90Magnesiorowlandite-(Y)Y4(Mg,Fe)(Si2O7)2F2Tric. 1 : P1
9.BE.92Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH)Trig. 3m : R3m
9.BE.92Chirvinskyite(Na,Ca)13(Fe,Mn,◻)2(Ti,Zr)5(Si2O7)4(OH,O)12 · 2H2OTric. 1 : P1
9.BE.95BatisiviteBaV3+8Ti6(Si2O7)O22Tric. 1 : P1
9.BE.95RusinoviteCa10(Si2O7)3Cl2 Orth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.97Schlüterite-(Y)(Y,REE)2AlSi2O7(OH)2FMon. 2/m : P21/b

Fluorescence of MelanotekiteHide

In UV light:
Not fluorescent in UV

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for MelanotekiteHide

References for MelanotekiteHide

Localities for MelanotekiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Germany
 
  • Baden-Württemberg
    • Freiburg Region
      • Breisgau-Hochschwarzwald
        • Badenweiler
Walenta (1992)
  • North Rhine-Westphalia
    • Arnsberg
      • Märkischer Kreis
        • Iserlohn
          • Letmathe
            • Helmke quarry nature reserve
Bender et al. (1994)
Italy
 
  • Sardinia
    • Sassari Province
      • Ozieri
Olmi F. et al. (1995)
Japan
 
  • Gunma Prefecture
    • Numata City
Yamada et al. (2019)
Mexico
 
  • Chihuahua
    • Chihuahua Municipality
      • Avalos
Espejel-Garcia et al. (2012, December)
Namibia
 
  • Oshikoto Region
    • Tsumeb
Gebhard (1999)
  • Otjozondjupa Region
    • Otavi Constituency
      • Kombat
Dunn (1991)
Norway
 
  • Viken
    • Lunner
      • Grua
        • Grua mining district
Harald Folvik Collection +1 other reference
Sweden
 
  • Dalarna County
    • Hedemora
      • Garpenberg
Swedish Museum of Natural History ...
  • Värmland County
    • Filipstad
      • Långban Ore District
Holtstam et al. (1999)
Adolfsson (1979)
      • Nordmark mining district
        • Jakobsberg ore field
GFF 38 +1 other reference
      • Persberg ore district
        • Pajsberg
Nysten (1984)
UK
 
  • England
    • Bristol
      • Henbury
Day (1999)
    • Somerset
      • Mendip
        • Cranmore
Turner (2006) +2 other references
        • Nunney
Day (1999)
        • Priddy
Burr (1996)
USA
 
  • Arizona
    • Mohave County
      • Artillery Mountains
        • Artillery Peak
Williams (1982)
    • Pinal County
      • Mammoth Mining District
        • Tiger
          • St. Anthony deposit
Galbraith (1959) +2 other references
      • Mineral Mountain Mining District
        • Reymert Canyon
Anthony et al. (1995)
  • California
    • Inyo County
      • Inyo Mts (Inyo Range)
Van Nostrand Reinholt Press: 515. +1 other reference
    • San Bernardino County
      • Silver Lake Mining District
        • Soda Mountains
          • Baker
            • Otto Mountain
Collected by and in the collection of ...
  • New Mexico
    • Sierra County
      • Hillsboro Mining District
        • Hillsboro
          • Percha Creek
Lindgren et al. (1910)
Rocks & Minerals 81:147-151
NMBMMR New Mexico Mineral symposium (2001)
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