Emmerichite
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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. Chukanoc, 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.
Classification of Emmerichite
Approved
Approval year:
2013
First published:
2014
8/C.13-X
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
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).
Chemical Properties of Emmerichite
Formula:
Ba2Na(Na,Fe2+)2(Fe3+,Mg)Ti2(Si2O7)2O2F2
IMA Formula:
Ba2Ti2Na3Fe3+(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
Warning: deg2rad() expects parameter 1 to be float, string given in /home/mindat/www/include.php on line 9209
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.
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
Relationship of Emmerichite to other Species
Member of:
Other Members of this 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. |
Epistolite | Na2(Nb,Ti)2(Si2O7)O2 · nH2O | Tric. |
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 | Na2CaBa4Ti3(Si2O7)2(SO4)2O4 | 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. |
Lileyite | Ba2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2 | Mon. 2/m : B2/m |
Nabalamprophyllite | Na3(Ba,Na)2Ti3(Si2O7)2O2(OH,F)2 | Mon. 2/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 |
Vuonnemite | Na11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH) | Tric. |
Zvyaginite | NaZnNb2Ti[Si2O7]20(OH,F)3(H2O)4 + (x < 1) | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
4 photos of Emmerichite associated with Günterblassite | (K,Ca,Ba)2(Fe,Ca,Mg,Na)[(Si,Al)13O25(OH)4] · 7H2O · |
1 photo of Emmerichite associated with Clinopyroxene Subgroup |
Related Minerals - Nickel-Strunz Grouping
9.BE. | Betalomonosovite | Na6◻4Ti4(Si2O7)2[PO3OH][PO2(OH)2]O2(OF) | Tric. 1 : P1 |
9.BE. | Cámaraite | Ba3Na(Fe2+,Mn)8Ti4(Si2O7)4O4(OH,F)7 | Tric. 1 |
9.BE. | Christofschäferite-(Ce) | Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8 | Mon. 2/m : P21/m |
9.BE. | Bobshannonite | Na2KBa(Mn,Na)8(Nb,Ti)4(Si2O7)4O4(OH)4(O,F)2 | Tric. |
9.BE. | Calciomurmanite | (Na,◻)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4 | Tric. 1 : P1 |
9.BE. | Batievaite-(Y) | Y2Ca2Ti(Si2O7)2(OH)2(H2O)4 | Tric. 1 : P1 |
9.BE. | Delhuyarite-(Ce) | Ce4Mg(Fe3+,W)3◻(Si2O7)2O6(OH)2 | Mon. 2/m : B2/m |
9.BE.X | Asimowite | Fe2+4O(Si2O7) | Orth. mmm (2/m 2/m 2/m) : Imma |
9.BE.02 | Wadsleyite | Mg4O(Si2O7) | Orth. |
9.BE.05 | Hennomartinite | SrMn3+2(Si2O7)(OH)2 · H2O | Orth. |
9.BE.05 | Lawsonite | CaAl2(Si2O7)(OH)2 · H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
9.BE.05 | Noelbensonite | BaMn3+2(Si2O7)(OH)2 · H2O | Orth. mm2 |
9.BE.05 | Itoigawaite | SrAl2(Si2O7)(OH)2 · H2O | Orth. |
9.BE.07 | Ilvaite | CaFe3+Fe2+2(Si2O7)O(OH) | Orth. mmm (2/m 2/m 2/m) |
9.BE.07 | Manganilvaite | CaFe2+Fe3+Mn2+(Si2O7)O(OH) | Mon. 2/m : P21/b |
9.BE.10 | Suolunite | Ca2(H2Si2O7) · H2O | Orth. |
9.BE.12 | Jaffeite | Ca6(Si2O7)(OH)6 | Trig. 3 : P3 |
9.BE.15 | Fresnoite | Ba2Ti(Si2O7)O | Tet. 4mm : P4bm |
9.BE.17 | Baghdadite | Ca6Zr2(Si2O7)2O4 | Mon. 2/m : P21/b |
9.BE.17 | Burpalite | Na2CaZr(Si2O7)F2 | Mon. |
9.BE.17 | Cuspidine | Ca4(Si2O7)(F,OH)2 | Mon. 2/m : P21/b |
9.BE.17 | Hiortdahlite | Na2Ca4(Ca0.5Zr0.5)Zr(Si2O7)2OF3 | Tric. 1 : P1 |
9.BE.17 | Janhaugite | (Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2 | Mon. 2/m : P21/m |
9.BE.17 | Låvenite | (Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2 | Mon. 2/m : P21/b |
9.BE.17 | Niocalite | (Ca,Nb)4(Si2O7)(O,OH,F)2 | Mon. |
9.BE.17 | Normandite | NaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF | Mon. 2/m : P21/b |
9.BE.17 | Wöhlerite | NaCa2(Zr,Nb)(Si2O7)(O,OH,F)2 | Mon. 2 : P21 |
9.BE.17 | Hiortdahlite I | Na4Ca8Zr2(Nb,Mn,Ti,Fe,Mg,Al)2(Si2O7)4O3F5 | Tric. 1 : P1 |
9.BE.20 | Mosandrite-(Ce) | (Ca3REE)[(H2O)2Ca0.5◻0.5]Ti(Si2O7)2(OH)2(H2O)2 | Mon. 2/m : P21/b |
9.BE.20 | Nacareniobsite-(Ce) | NbNa3Ca3(Ce,REE )(Si2O7)2OF3 | Mon. |
9.BE.22 | Götzenite | NaCa6Ti(Si2O7)2OF3 | Tric. 1 : P1 |
9.BE.22 | Hainite-(Y) | Na2Ca4(Y,REE)Ti(Si2O7)2OF3 | Tric. 1 : P1 |
9.BE.22 | Rosenbuschite | Na6Ca6Zr3Ti(Si2O7)4O2F6 | Tric. 1 : P1 |
9.BE.22 | Kochite | Na3Ca2MnZrTi(Si2O7)2OF3 | Tric. 1 : P1 |
9.BE.23 | Dovyrenite | Ca6Zr(Si2O7)2(OH)4 | Orth. mmm (2/m 2/m 2/m) : Pnnm |
9.BE.25 | Barytolamprophyllite | (Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F) | Mon. |
9.BE.25 | Ericssonite | BaMn2+2Fe3+(Si2O7)O(OH) | Mon. 2/m : B2/m |
9.BE.25 | Lamprophyllite | (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2 | Mon. |
9.BE.25 | Ericssonite-2O | BaMn2+2Fe3+(Si2O7)O(OH) | Orth. |
9.BE.25 | Seidozerite | Na4MnZr2Ti(Si2O7)2O2F2 | Mon. |
9.BE.25 | Nabalamprophyllite | Na3(Ba,Na)2Ti3(Si2O7)2O2(OH,F)2 | Mon. 2/m |
9.BE.25 | Grenmarite | Na4MnZr3(Si2O7)2O2F2 | Mon. 2/m : P2/b |
9.BE.25 | Schüllerite | Ba2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4 | Tric. 1 : P1 |
9.BE.25 | Lileyite | Ba2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2 | Mon. 2/m : B2/m |
9.BE.25 | Fluorbarytolamprophyllite | (Ba,Sr)2[(Na,Fe2+)3(Ti,Mg)F2][Ti2(Si2O7)2O2] | Mon. 2/m : B2/m |
9.BE.27 | Murmanite | Na2Ti2(Si2O7)O2 · 2H2O | Tric. |
9.BE.30 | Epistolite | Na2(Nb,Ti)2(Si2O7)O2 · nH2O | Tric. |
9.BE.32 | Lomonosovite | Na5Ti2(Si2O7)(PO4)O2 | Tric. 1 : P1 |
9.BE.35 | Vuonnemite | Na11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH) | Tric. |
9.BE.37 | Sobolevite | Na13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3 | Mon. m : Pb |
9.BE.40 | Innelite | Na2CaBa4Ti3(Si2O7)2(SO4)2O4 | Tric. 1 : P1 |
9.BE.40 | Phosphoinnelite | Na3Ba4Ti3(Si2O7)2(PO4,SO4)2O2F | Tric. |
9.BE.42 | Yoshimuraite | Ba2Mn2Ti(Si2O7)(PO4)O(OH) | Tric. 1 : P1 |
9.BE.45 | Quadruphite | Na14Ca2Ti4(Si2O7)2(PO4)2O2F | Tric. |
9.BE.47 | Polyphite | Na5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2 | Tric. 1 : P1 |
9.BE.50 | Bornemanite | Na6BaTi2Nb(Si2O7)2(PO4)O2(OH)F | Tric. 1 : P1 |
9.BE.50 | Shkatulkalite | Na5(Nb1-xTix)2(Ti1-yMn2+y)[Si2O7]2O2(OH)2 · nH2O | Mon. 2/m : P2/m |
9.BE.55 | Bafertisite | Ba2Fe2+4Ti2(Si2O7)2O2(OH)2F2 | Tric. |
9.BE.55 | Hejtmanite | Ba2Mn2+4Ti2(Si2O7)2O2(OH)2F2 | Tric. 1 |
9.BE.55 | Bykovaite | (Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2O | Mon. 2/m |
9.BE.55 | 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 |
9.BE.60 | Delindeite | (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O | Mon. |
9.BE.65 | Bussenite | Na2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3F | Tric. 1 : P1 |
9.BE.67 | Jinshajiangite | BaNaFe2+4Ti2(Si2O7)2O2(OH)2F | Tric. 1 : P1 |
9.BE.67 | Perraultite | BaNaMn2+4Ti2(Si2O7)2O2(OH)2F | Mon. 2/m : B2/m |
9.BE.70 | Karnasurtite-(Ce) | (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O | Amor. |
9.BE.70 | Perrierite-(Ce) | Ce4MgFe3+2Ti2(Si2O7)2O8 | Mon. 2/m : P21/b |
9.BE.70 | Strontiochevkinite | (Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8 | Mon. |
9.BE.70 | Chevkinite-(Ce) | (Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8 | Mon. 2/m : P21/b |
9.BE.70 | Polyakovite-(Ce) | (Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8 | Mon. 2/m : B2/m |
9.BE.70 | Rengeite | Sr4ZrTi4(Si2O7)2O8 | Mon. 2/m : P21/b |
9.BE.70 | Matsubaraite | Sr4Ti5(Si2O7)2O8 | Mon. 2/m : P21/b |
9.BE.70 | Dingdaohengite-(Ce) | (Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe2+)2Ti2(Si2O7)2O8 | Mon. 2/m : P21/b |
9.BE.70 | Maoniupingite-(Ce) | (Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8 | Mon. 2/m : B2/m |
9.BE.70 | Perrierite-(La) | (La,Ce,Ca)4(Fe,Mn2+,Mg)Fe3+2(Ti,Fe3+)2(Si2O7)2O8 | Mon. 2/m : P21/b |
9.BE.70 | UM2008-53-SiO:SrTiZr | Sr4ZrTi4(Si2O7)2O8 | Orth. mmm (2/m 2/m 2/m) : Pbca |
9.BE.70 | Hezuolinite | (Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8 | Mon. 2/m : B2/m |
9.BE.72 | Fersmanite | Ca4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3 | Tric. |
9.BE.75 | Belkovite | Ba3(Nb,Ti)6(Si2O7)2O12 | Hex. |
9.BE.77 | Nasonite | Pb6Ca4(Si2O7)3Cl2 | Hex. |
9.BE.80 | Kentrolite | Pb2Mn3+2(Si2O7)O2 | Orth. mmm (2/m 2/m 2/m) : Pbcm |
9.BE.80 | Melanotekite | Pb2Fe3+2(Si2O7)O2 | Orth. 2 2 2 : C2 2 21 |
9.BE.82 | Tilleyite | Ca5(Si2O7)(CO3)2 | Mon. |
9.BE.85 | Killalaite | Ca6.4(H0.6Si2O7)2(OH)2 | Mon. |
9.BE.87 | Stavelotite-(La) | (La,Nd,Ca)3Mn2+3Cu(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30 | Trig. 3 : P31 |
9.BE.90 | Biraite-(Ce) | Ce2Fe2+(Si2O7)(CO3) | Mon. 2/m : P21/b |
9.BE.92 | Cervandonite-(Ce) | (Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH) | Trig. 3m : R3m |
9.BE.95 | Batisivite | BaV3+8Ti6(Si2O7)O22 | Tric. 1 : P1 |
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.
References for Emmerichite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chukanov, N.V., Rastsvetaeva, R.K., Aksenov, S.M., Blass, G., Pekov, I.V., Belakovskiy, D.I., Tschörtner, J. (2013) Emmerichite, IMA 2013-064. CNMNC Newsletter No. 17, October 2013, page 3004; Mineralogical Magazine: 77: 2997-3005.
Aksenov, S.M., Rastsvetaeva, R.K., Chukanov, N.V. (2014) The crystal structure of emmerichite Ва 2Na 3Fe 3+ Ti 2 (Si 2O 7) 2O 2F 2, a new lamprophyllite-group mineral. Zeitschrift für Kristallographie–Crystalline Materials: 229(1): 1-7.
Chukanov, N.V., Rastsvetaeva, R.K., Aksenov, D.M., Blass, G., Pekov, I.V., Belakovskiy, D.I., Tschörtner, J., Schüller, W., Ternes, B. (2014) Emmerichite, Ва2Na(Na,Fe2+)2(Fe3+,Mg)Ti2(Si2O7)2O2F2, a new lamprophyllite-group mineral from the Eifel volcanic region, Germany. New Data on Minerals: 49: 5–13.
Internet Links for Emmerichite
mindat.org URL:
https://www.mindat.org/min-43943.html
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Localities for Emmerichite
Locality List




All localities listed without proper references should be considered as questionable.
Germany (TL) | |
| Chukanov, N.V., Rastsvetaeva, R.K., Aksenov, S.M., Blass, G., Pekov, I.V., Belakovskiy, D.I. and Tschörtner, J. (2013) Emmerichite, IMA 2013-064. CNMNC Newsletter No. 17, October 2013, page 3004; Mineralogical Magazine, 77, 2997-3005. |
| Blaß, G. & Kruijen, F. (2014): Die Neuigkeiten aus der Vulkaneifel (2/14). Mineralien-Welt 25 (5), 62-75 (in German). |
Rother Kopf, Roth, Gerolstein, Gerolstein, Vulkaneifel District, Rhineland-Palatinate, Germany