Emmerichite
A valid IMA mineral species
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About Emmerichite
Formula:
Ba2Na(Na,Fe2+)2(Fe3+,Mg)Ti2(Si2O7)2O2F2
Colour:
brown
Lustre:
Vitreous
Hardness:
3 - 4
Specific Gravity:
3.864 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named by Nikita V. Chukanov, et al. in 2013 in honor of Franz-Josef Emmerich (1940 - ), German amateur mineralogist and collector, for his contributions to the mineralogy of the Eifel region. He published the first compact disc with photos and data on Eifel minerals.
The first Fe3+-dominant titanium member of the lamprophyllite group.
Unique Identifiers
Mindat ID:
43943
Long-form identifier:
mindat:1:1:43943:9
IMA Classification of Emmerichite
Classification of Emmerichite
9.BE.25
9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Emr | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Emmerichite
Vitreous
Transparency:
Transparent
Colour:
Brown
Streak:
White
Hardness:
3 - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {100}
on {100}
Density:
3.864 g/cm3 (Calculated)
Optical Data of Emmerichite
Type:
Biaxial (+)
RI values:
nα = 1.725(4) nβ = 1.728(4) nγ = 1.759(4)
2V:
Measured: 80° (5), Calculated: 79°
Max Birefringence:
δ = 0.034

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v, medium
Pleochroism:
Visible
Comments:
moderate: Z (brown) ≥ Y (light brown) > X (greenish gray).
Chemistry of Emmerichite
Mindat Formula:
Ba2Na(Na,Fe2+)2(Fe3+,Mg)Ti2(Si2O7)2O2F2
Crystallography of Emmerichite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 19.960(1) Å, b = 7.098(1) Å, c = 5.4074(3) Å
γ = 96.368(1)°
γ = 96.368(1)°
Ratio:
a:b:c = 2.812 : 1 : 0.762
Unit Cell V:
0.00 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
9.97 Å | (55) |
3.461 Å | (65) |
3.312 Å | (40) |
2.882 Å | (38) |
2.792 Å | (100) |
2.670 Å | (56) |
2.629 Å | (42) |
2.140 Å | (57) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Emmerichite
General Appearance of Type Material:
Emmerichite forms lamellar (often plank-like) crystals up to 0.05 × 0.3 × 0.5 mm in size and clusters up to 1mm across.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4225/1.
Geological Setting of Type Material:
Alkaline basalts. high-temperature pneumatolitic
Associated Minerals at Type Locality:
Synonyms of Emmerichite
Other Language Names for Emmerichite
Dutch:Emmerichiet
German:Emmerichit
Relationship of Emmerichite to other Species
Member of:
Other Members of Lamprophyllite Group:
Barytolamprophyllite | (Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F) | Mon. |
Bornemanite | Na6BaTi2Nb(Si2O7)2(PO4)O2(OH)F | Tric. 1 : P1 |
Delindeite | (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O | Mon. 2/m : B2/m |
Epistolite | (Na◻)Nb2Na3Ti(Si2O7)2O2(OH)2(H2O)4 | Tric. 1 : P1 |
Fluorbarytolamprophyllite | (Ba,Sr)2[(Na,Fe2+)3(Ti,Mg)F2][Ti2(Si2O7)2O2] | Mon. 2/m : B2/m |
Fluorlamprophyllite | Na3(SrNa)Ti3(Si2O7)2O2F2 | Mon. 2/m : B2/m |
Innelite | Ba4Ti2Na(NaMn2+)Ti(Si2O7)2[(SO4)(PO4)]O2[O(OH)] | Tric. 1 : P1 |
Kazanskyite | BaNa3Ti2Nb(Si2O7)2O2(OH)2(H2O)4 | Tric. 1 : P1 |
Lamprophyllite | (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2 | Mon. 2/m |
Lileyite | Ba2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2 | Mon. 2/m : B2/m |
Nabalamprophyllite | (BaNa)Ti2Na3Ti(Si2O7)2O2(OH)2 | Mon. 2/m : P2/m |
Nechelyustovite | (Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2O | Mon. 2/m : B2/m |
Phosphoinnelite | Na3Ba4Ti3(Si2O7)2(PO4,SO4)2O2F | Tric. |
Polyphite | Na5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2 | Tric. 1 : P1 |
Saamite | Ba◻Na3Ti2Nb(Si2O7)2O2(OH)F(H2O)2 | Tric. 1 : P1 |
Shkatulkalite | Na2Nb2Na3Ti(Si2O7)2O2(FO)(H2O)4(H2O)3 | Tric. 1 : P1 |
Vuonnemite | Na11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH) | Tric. |
Zvyaginite | NaZnNb2Ti[Si2O7]2(OH,F)3(H2O)4+x (x < 1) | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
9 photos of Emmerichite associated with Günterblassite | (K,Ca,Ba)2(Fe,Ca,Mg,Na)[(Si,Al)13O25(OH)4] · 7H2O · |
2 photos of Emmerichite associated with Fluorapatite | Ca5(PO4)3F |
1 photo of Emmerichite associated with Clinopyroxene Subgroup | |
1 photo of Emmerichite associated with Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
1 photo of Emmerichite associated with Pyroxene Group | ADSi2O6 |
1 photo of Emmerichite associated with Phlogopite | KMg3(AlSi3O10)(OH)2 |
1 photo of Emmerichite associated with Götzenite | NaCa6Ti(Si2O7)2OF3 |
Related Minerals - Strunz-mindat Grouping
9.BE. | Zinkgruvanite | Ba4Mn2+4Fe3+2(Si2O7)2(SO4)2O2(OH)2 |
9.BE. | Calciomurmanite | (Na,◻)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4 |
9.BE. | Cámaraite | Ba3Na(Fe2+,Mn)8Ti4(Si2O7)4O4(OH,F)7 |
9.BE. | Alfredcasparite | Sr2TiO(Si2O7) |
9.BE. | Batievaite-(Y) | Y2Ca2Ti(Si2O7)2(OH)2(H2O)4 |
9.BE. | Nacareniobsite-(Y) | Na3Ca3YNb(Si2O7)2OF3 |
9.BE. | Alexkuznetsovite-(Ce) | Ce2Mn(CO3)(Si2O7) |
9.BE. | Bobshannonite | Na2KBa(Mn,Na)8(Nb,Ti)4(Si2O7)4O4(OH)4(O,F)2 |
9.BE. | Paralomonosovite | Na6◻4Ti4(Si2O7)2[PO3OH][PO2(OH)2]O2(OF) |
9.BE. | Madeiraite | Na2Ca2Fe2Zr2(Si2O7)2O2F2 |
9.BE. | Bortolanite | Ca2(Ca1.5Zr0.5)Na(NaCa)Ti(Si2O7)2(OF)F2 |
9.BE. | Moxuanxueite | NaCa6Zr(Si2O7)2OF3 |
9.BE. | Delhuyarite-(Ce) | Ce4Mg(Fe3+,W)3◻(Si2O7)2O6(OH)2 |
9.BE. | Christofschäferite-(Ce) | Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8 |
9.BE.X | Asimowite | Fe2+4O(Si2O7) |
9.BE. | Biraite-(La) | La2Fe2+(CO3)(Si2O7) |
9.BE. | Pilanesbergite | Na2Ca2Fe2Ti2(Si2O7)2O2F2 |
9.BE.02 | Wadsleyite | Mg4O(Si2O7) |
9.BE.02 | Ohtaniite | Mg3(Si0.5◻0.5)Si2O8 |
9.BE.05 | Lawsonite | CaAl2(Si2O7)(OH)2 · H2O |
9.BE.05 | Hennomartinite | SrMn3+2(Si2O7)(OH)2 · H2O |
9.BE.05 | Cortesognoite | CaV2(Si2O7)(OH)2 · H2O |
9.BE.05 | Noelbensonite | BaMn3+2(Si2O7)(OH)2 · H2O |
9.BE.05 | Itoigawaite | SrAl2(Si2O7)(OH)2 · H2O |
9.BE.07 | Ilvaite | CaFe3+Fe2+2(Si2O7)O(OH) |
9.BE.07 | Amamoorite | CaMn2+2Mn3+(Si2O7)O(OH) |
9.BE.07 | Manganilvaite | CaFe2+Fe3+Mn2+(Si2O7)O(OH) |
9.BE.10 | Suolunite | Ca2(H2Si2O7) · H2O |
9.BE.12 | Jaffeite | Ca6(Si2O7)(OH)6 |
9.BE.15 | Fresnoite | Ba2Ti(Si2O7)O |
9.BE.17 | Janhaugite | (Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2 |
9.BE.17 | Burpalite | Na2CaZr(Si2O7)F2 |
9.BE.17 | Niocalite | (Ca,Nb)4(Si2O7)(O,OH,F)2 |
9.BE.17 | Normandite | NaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF |
9.BE.17 | Hiortdahlite | Na2Ca4(Ca0.5Zr0.5)Zr(Si2O7)2OF3 |
9.BE.17 | Låvenite | Na2Ca2Mn2Zr2(Si2O7)2O2F2 |
9.BE.17 | Cuspidine | Ca8(Si2O7)2F4 |
9.BE.17 | Wöhlerite | Na2Ca4ZrNb(Si2O7)2O3F |
9.BE.17 | Baghdadite | Ca6Zr2(Si2O7)2O4 |
9.BE.20 | Nacareniobsite-(Ce) | Na3Ca3(Ce,REE)Nb(Si2O7)2OF3 |
9.BE.20 | Roumaite | (Ca,Na,REE,◻)7(Nb,Ti)[Si2O7]2OF3 |
9.BE.20 | Rinkite-(Ce) | (Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2 |
9.BE.20 | Nacareniobsite-(Nd) | Ca2(CaNd)Na3Nb(Si2O7)2(OF)F2 |
9.BE.20 | Rinkite-(Y) | Na2Ca4YTi(Si2O7)2OF3 |
9.BE.20 | Mosandrite-(Ce) | (Ca3REE)[(H2O)2Ca0.5◻0.5]Ti(Si2O7)2(OH)2(H2O)2 |
9.BE.22 | Hainite-(Y) | Na2Ca4(Y,REE)Ti(Si2O7)2OF3 |
9.BE.22 | Rosenbuschite | Na6Ca6Zr3Ti(Si2O7)4O2F6 |
9.BE.22 | Götzenite | NaCa6Ti(Si2O7)2OF3 |
9.BE.22 | Fogoite-(Y) | Na3Ca2Y2Ti(Si2O7)2OF3 |
9.BE.22 | Kochite | Na3Ca2MnZrTi(Si2O7)2OF3 |
9.BE.23 | Dovyrenite | Ca6Zr(Si2O7)2(OH)4 |
9.BE.25 | Lamprophyllite | (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2 |
9.BE.25 | Seidozerite | Na4MnZr2Ti(Si2O7)2O2F2 |
9.BE.25 | Nabalamprophyllite | (BaNa)Ti2Na3Ti(Si2O7)2O2(OH)2 |
9.BE.25 | Schüllerite | Ba2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4 |
9.BE.25 | Ericssonite | BaMn2+2Fe3+(Si2O7)O(OH) |
9.BE.25 | Grenmarite | Na4MnZr3(Si2O7)2O2F2 |
9.BE.25 | Kazanskyite | BaNa3Ti2Nb(Si2O7)2O2(OH)2(H2O)4 |
9.BE.25 | Saamite | Ba◻Na3Ti2Nb(Si2O7)2O2(OH)F(H2O)2 |
9.BE.25 | Barytolamprophyllite | (Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F) |
9.BE.25 | Ericssonite-2O | BaMn2+2Fe3+(Si2O7)O(OH) |
9.BE.25 | Fluorbarytolamprophyllite | (Ba,Sr)2[(Na,Fe2+)3(Ti,Mg)F2][Ti2(Si2O7)2O2] |
9.BE.25 | Fluorlamprophyllite | Na3(SrNa)Ti3(Si2O7)2O2F2 |
9.BE.25 | Lileyite | Ba2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2 |
9.BE.27 | Kolskyite | CaNa2Ti4(Si2O7)2O4(H2O)7 |
9.BE.27 | Vigrishinite | NaZnTi4(Si2O7)2O3(OH)(H2O)4 |
9.BE.27 | Selivanovaite | NaFe3+Ti4(Si2O7)2O4(H2O)4 |
9.BE.27 | Murmanite | Na2Ti2(Si2O7)O2 · 2H2O |
9.BE.30 | Epistolite | (Na◻)Nb2Na3Ti(Si2O7)2O2(OH)2(H2O)4 |
9.BE.32 | Lomonosovite | Na5Ti2(Si2O7)(PO4)O2 |
9.BE.35 | Vuonnemite | Na11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH) |
9.BE.37 | Sobolevite | Na13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3 |
9.BE.40 | Ferroinnelite | Ba4Ti2Na(NaFe2+)Ti(Si2O7)2[(SO4)(PO4)]O2[O(OH)] |
9.BE.40 | Phosphoinnelite | Na3Ba4Ti3(Si2O7)2(PO4,SO4)2O2F |
9.BE.40 | Innelite | Ba4Ti2Na(NaMn2+)Ti(Si2O7)2[(SO4)(PO4)]O2[O(OH)] |
9.BE.42 | Yoshimuraite | Ba2Mn2Ti(Si2O7)(PO4)O(OH) |
9.BE.42 | Horiite | Ba2Mn2Mn4Ti2(Si2O7)2(PO4)2O2(OH)2 |
9.BE.45 | Quadruphite | Na6Na2(CaNa)2Na2Ti2Na2Ti2(Si2O7)2(PO4)4O4F2 |
9.BE.47 | Polyphite | Na5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2 |
9.BE.50 | Shkatulkalite | Na2Nb2Na3Ti(Si2O7)2O2(FO)(H2O)4(H2O)3 |
9.BE.50 | Bornemanite | Na6BaTi2Nb(Si2O7)2(PO4)O2(OH)F |
9.BE.55 | Hejtmanite | Ba2Mn2+4Ti2(Si2O7)2O2(OH)2F2 |
9.BE.55 | Bykovaite | (Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2O |
9.BE.55 | Nechelyustovite | (Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2O |
9.BE.55 | Bafertisite | Ba2Fe2+4Ti2(Si2O7)2O2(OH)2F2 |
9.BE.60 | Delindeite | (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O |
9.BE.62 | Orthochevkinite | (Ce,La,Ca,Na,Th)4(Fe2+,Mg)2(Ti,Fe3+)3Si4O22 |
9.BE.62 va | Strontium Perrierite | (Ce,Sr,La,Ca)4Fe2+(Ti,Zr,Fe)2Ti2(Si2O7)2O8 |
9.BE.62 | Chevkinite-(Nd) | (Nd,REE)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8 ? |
9.BE.62 | Perrierite-(Nd) | Nd4MgFe3+2Ti2(Si2O7)2O8 ? |
9.BE.65 | Bussenite | Na2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3F |
9.BE.67 | Jinshajiangite | BaNaFe2+4Ti2(Si2O7)2O2(OH)2F |
9.BE.67 | Perraultite | BaNaMn2+4Ti2(Si2O7)2O2(OH)2F |
9.BE.70 | Dingdaohengite-(Ce) | (Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe3+)2Ti2(Si2O7)2O8 |
9.BE.70 | Perrierite-(Ce) | Ce4MgFe3+2Ti2O8(Si2O7)2 |
9.BE.70 | Karnasurtite-(Ce) | (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O |
9.BE.70 | Maoniupingite-(Ce) | (Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8 |
9.BE.70 | Matsubaraite | Sr4Ti5(Si2O7)2O8 |
9.BE.70 | Rengeite | Sr4ZrTi4(Si2O7)2O8 |
9.BE.70 | Polyakovite-(Ce) | (Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8 |
9.BE.70 | Hezuolinite | (Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8 |
9.BE.70 | UM2008-53-SiO:SrTiZr | Sr4ZrTi4(Si2O7)2O8 |
9.BE.70 | Chevkinite-(Ce) | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
9.BE.70 | Perrierite-(La) | (La,Ce,Ca)4(Fe2+,Mn)(Ti,Fe3+,Al)4[(Si2O7)O4]2 |
9.BE.70 | Strontiochevkinite | (Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8 |
9.BE.72 | Fersmanite | Ca4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3 |
9.BE.75 | Belkovite | Ba3(Nb,Ti)6(Si2O7)2O12 |
9.BE.77 | Nasonite | Pb6Ca4(Si2O7)3Cl2 |
9.BE.80 | Melanotekite | Pb2Fe3+2(Si2O7)O2 |
9.BE.80 | Kentrolite | Pb2Mn3+2(Si2O7)O2 |
9.BE.82 | Alexkuznetsovite-(La) | La2Mn(CO3)(Si2O7) |
9.BE.82 | Tilleyite | Ca5(Si2O7)(CO3)2 |
9.BE.85 | Killalaite | Ca6.4(H0.6Si2O7)2(OH)2 |
9.BE.87 | Stavelotite-(La) | (La,Nd,Ca)3Mn2+3Cu(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30 |
9.BE.90 | Magnesiorowlandite-(Y) | Y4(Mg,Fe)(Si2O7)2F2 |
9.BE.90 | Biraite-(Ce) | Ce2Fe2+(Si2O7)(CO3) |
9.BE.92 | Cervandonite-(Ce) | (Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH) |
9.BE.92 | Chirvinskyite | (Na,Ca)13(Fe,Mn,◻)2(Ti,Zr)5(Si2O7)4(OH,O)12 · 2H2O |
9.BE.95 | Rusinovite | Ca10(Si2O7)3Cl2 |
9.BE.95 | Batisivite | BaV3+8Ti6(Si2O7)O22 |
9.BE.97 | Schlüterite-(Y) | (Y,REE)2AlSi2O7(OH)2F |
Fluorescence of Emmerichite
Shows no fluorescence in the UV wavelength range
Other Information
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 Emmerichite
mindat.org URL:
https://www.mindat.org/min-43943.html
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References for Emmerichite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No.17. Mineralogical Magazine, 77 (7) 2997-3005 doi:10.1180/minmag.2013.077.7.09
Localities for Emmerichite
Locality List




All localities listed without proper references should be considered as questionable.
Germany (TL) | |
| Williams et al. (2013) |
| Blaß et al. (2014) +1 other reference |
Spain | |
| Dill et al. (2023) |
Dill et al. (2023) |
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Rother Kopf, Roth, Gerolstein, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany