Laachite (original) (raw)
A valid IMA mineral species
About LaachiteHide
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Formula:
(Ca,Mn)2Zr2Nb2TiFeO14
Specific Gravity:
5.417 (Calculated)
Crystal System:
Monoclinic
Name:
For the type locality
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:43866:1
166e8a12-2665-4308-ae94-0e238468d28c
IMA Classification of LaachiteHide
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Type description reference:
Chukanov, Nikita V., Krivovichev, Sergey V., Pakhomova, Anna S., Pekov, Igor V., Schäfer, Christof, Vigasina, Marina F., Van, Konstantin V. (2014) Laachite, (Ca,Mn)2Zr2Nb2TiFeO14, a new zirconolite-related mineral from the Eifel volcanic region, Germany. European Journal of Mineralogy, 26 (1) 103-111 doi:10.1127/0935-1221/2013/0025-2343
Classification of LaachiteHide
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4.DH.30
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Laa | 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 LaachiteHide
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Fracture:
Irregular/Uneven
Density:
5.417 g/cm3 (Calculated)
Chemistry of LaachiteHide
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Mindat Formula:
(Ca,Mn)2Zr2Nb2TiFeO14
Crystallography of LaachiteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 7.3119(5) Å, b = 14.179(1) Å, c = 10.1700(7) Å
β = 90.072(2)°
Ratio:
a:b:c = 0.516 : 1 : 0.717
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020511 | Laachite | Chukanov N V, Krivovichev S V, Pakhomova A S,Pekov I V,Schafer C, Vigasina M F, Van K V (2011) Laachite, (Ca,Mn)2Zr2Nb2TiFeO14, a new zirconolite-related mineral from the Eifel volcanic region, Germany European Journal of Mineralogy 26 103-111 | 2011 | Laach Lake volcano, Eifel region, Germany | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.298 Å | (22) |
| 2.967 Å | (100) |
| 2.901 Å | (59) |
| 2.551 Å | (32) |
| 1.800 Å | (34) |
| 1.541 Å | (24) |
| 1.535 Å | (23) |
| 1.529 Å | (23) |
Comments:
From Type Description.
Geological EnvironmentHide
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Type Occurrence of LaachiteHide
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General Appearance of Type Material:
long-prismatic crystals up to 0.02 × 0.04 × 0.5 mm, which are present as random intergrowths and twins in cavities within sanidinite.
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 4361/1
Geological Setting of Type Material:
Ejectum, Nosean-bearing syenite
Associated Minerals at Type Locality:
Reference:
Chukanov, N. V., Krivovichev, S. V., Pakhomova, A. S., Pekov, I. V., Schäfer, C., Vigasina, M. F., & Van, K. V. (2014). Laachite,(Ca, Mn) 2Zr2Nb2TiFeO14, a new zirconolite-related mineral from the Eifel volcanic region, Germany. European Journal of Mineralogy, 26(1), 103-111.
Synonyms of LaachiteHide
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Related Minerals - Strunz-mindat GroupingHide
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| 4.DH. | Fluornatropyrochlore | (Na,Pb,Ca,REE,U)2Nb2O6F | Iso. m_3_m _(_4/_m_32/m ) |
|---|---|---|---|
| 4.DH. | Roméite Group | A2(Sb5+)2O6Z | |
| 4.DH. | Hydroxykenomicrolite | (◻,Na,Sb3+)2Ta2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH. | Fluornatroroméite | (Na,Ca)2Sb2(O,OH)6F | |
| 4.DH. | Oxyplumboroméite | Pb2Sb2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH. | Cesiokenopyrochlore | ◻Nb2(O,OH)6(Cs,◻) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH. | Oxyyttrobetafite-(Y) | Y2Ti2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.05 | Brannerite | UTi2O6 | Mon. 2/m : _B_2/m |
| 4.DH.05 | Orthobrannerite | U4+U6+Ti4O12(OH)2 | Orth. |
| 4.DH.05 | Thorutite | (Th,U,Ca)Ti2(O,OH)6 | Mon. |
| 4.DH.10 | Kassite | CaTi2O4(OH)2 | Mon. 2/m : _P_21/b |
| 4.DH.10 | Lucasite-(Ce) | CeTi2(O,OH)6 | Mon. |
| 4.DH.15 va | Alumotungstite | ◻2W2O6(H2O) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Bismutomicrolite (of Hogarth 1977) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m | |
| 4.DH.15 | Hydroplumboelsmoreite | (Pb,◻)(W,Fe3+)2O6 · H2O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Hydropyrochlore | (H2O,◻)2Nb2(O,OH)6(H2O) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Plumbomicrolite (of Hogarth 1977) | ||
| 4.DH.15 | Stibiomicrolite (of Groat et al.) | ||
| 4.DH.15 | Strontiopyrochlore (of Hogarth 1977) | A2Nb2(O,OH)6Z | |
| 4.DH.15 | Fluornatromicrolite | (Na1.5Bi0.5)Ta2O6F | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Bismutopyrochlore (of Chukanov et al.) | (Bi,Ca,U,Pb)2-xNb2(O,OH)6(OH) | Amor. |
| 4.DH.15 | Hydrokenoelsmoreite | ◻2W2O6(H2O) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Fluorcalciomicrolite | (Ca,Na)2(Ta,Nb)2O6F | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Oxycalciobetafite | Ca2(Ti,Nb)2O6O | |
| 4.DH.15 va | Yttromicrolite (of Hogarth) | (Ca,Y3+,U,Na)2-x(Ta,Nb,Ti,Fe3+)2O7 | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Oxynatropyrochlore | (Na,Ca,U)2Nb2O6(O,OH) | |
| 4.DH.15 | Hydroxycalciopyrochlore | (Ca,Na,U,◻)2(Nb,Ti)2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Fluorcalciopyrochlore | (Ca,Na)2(Nb, Ti)2O6F | Iso. |
| 4.DH.15 | Oxycalciopyrochlore | Ca2Nb2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Fluorstrontiopyrochlore | (Sr,◻)2Nb2(O,OH)6F | |
| 4.DH.15 | Oxyplumbopyrochlore | Pb2Nb2O6O | |
| 4.DH.15 | Kenoplumbopyrochlore | (Pb,◻)Nb2O6(◻,O) | |
| 4.DH.15 | Oxyyttropyrochlore-(Y) | (Y,◻)2Nb2O6O | |
| 4.DH.15 | Fluorkenopyrochlore | (◻,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F | |
| 4.DH.15 | Oxyuranobetafite | (U,Ca,◻)2(Ti,Nb)2O6O | |
| 4.DH.15 | Oxycalciomicrolite | Ca2Ta2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Oxystannomicrolite | Sn2Ta2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Kenoplumbomicrolite | (Pb,◻)2Ta2O6(◻,OH,O) | Iso. |
| 4.DH.15 | Oxystibiomicrolite | (Sb3+,Ca)2Ta2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Hydromicrolite | (H2O,◻)2Ta2(O,OH)6(H2O) | |
| 4.DH.15 | Hydrokenomicrolite | (◻,H2O)2Ta2(O,OH)6(H2O) | Iso. m_3_m _(_4/_m_32/m ) |
| 4.DH.15 | Hydroxymanganopyrochlore | (Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) | Iso. m_3(2/m_3) |
| 4.DH.15 | Hydroxycalciomicrolite | Ca1.5Ta2O6(OH) | Iso. 432 : _P_4232 |
| 4.DH.15 | Fluorplumbopyrochlore | (Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6F | Iso. |
| 4.DH.15 | Hydroxyplumbopyrochlore | (Pb1.5◻0.5)Nb2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Oxynatromicrolite | (Na,Ca,U)2(Ta,Nb)2O6(O,F) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Fluorhydropyrochlore | ||
| 4.DH.15 | Hydroxykenoelsmoreite | (◻,Pb)2(W,Fe3+,Al)2(O,OH)6(OH) | Trig. 3 : _R_3 |
| 4.DH.15 | Hydrokenopyrochlore | (◻,x)2Nb2O6(H2O,Cs) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Hydroxykenopyrochlore | (◻,Ce,Ba)2(Nb,Ti)2O6(OH,F) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Hydroxynatropyrochlore | (Na,Ca,Ce)2Nb2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Hydroxynatromicrolite | (Na,Bi3+,◻)2Ta2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.15 | Unnamed (Sb-analogue of Hydroxymanganopyrochlor) | (Mn,Ca,Y)2(Sb,Ti)2O6(OH) | |
| 4.DH.15 | Oxybismutomicrolite | (Bi1.33◻0.67)Σ2Ta2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.20 | Bindheimite | Pb2Sb2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.20 | Hydroxycalcioroméite | (Ca,Sb3+)2(Sb5+,Ti)2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.20 | Monimolite | Pb2Sb5+2O7 | Iso. m_3_m _(_4/_m_32/m ) |
| 4.DH.20 | Cuproroméite | Cu2Sb2(O,OH)7 | Iso. |
| 4.DH.20 | Stetefeldtite | Ag2Sb2(O,OH)7 | Iso. |
| 4.DH.20 | Stibiconite | Sb3+Sb5+2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) |
| 4.DH.20 | Fluorcalcioroméite | (Ca,Na,◻)2Sb5+2(O,OH)6F | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.20 | Oxycalcioroméite | Ca2Sb2O6O | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.20 | Hydroxyferroroméite | (Fe2+1.5◻0.5)Sb5+2O6(OH) | Iso. m_3_m _(_4/_m_32/m ) : F d_3_m |
| 4.DH.25 | Rosiaite | PbSb5+2O6 | Trig. 3_m_ _(_32/m ) : P_31_m |
| 4.DH.30 | Zirconolite | CaZrTi2O7 | Orth. |
| 4.DH.30 | Nöggerathite-(Ce) | (Ce,Ca)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c a |
| 4.DH.30 | Stefanweissite | (Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c a |
| 4.DH.35 | Liandratite | U(Nb,Ta)2O8 | Trig. 3_m_ _(_32/m ) : P_31_m |
| 4.DH.35 | Petscheckite | UFe(Nb,Ta)2O8 | Hex. |
| 4.DH.40 | Ingersonite | Ca3Mn2+Sb5+4O14 | Trig. 32 : _P_3121 |
| 4.DH.45 | Pittongite | Na0.22(W,Fe3+)(O,OH)3 · 0.44H2O | Hex. 6_m_2 : _P_6_m_2 |
| 4.DH.50 | Tazzoliite | Ba4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) | Orth. m m m _(_2/_m_2/_m_2/m ) : F m m m |
Other InformationHide
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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 LaachiteHide
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References for LaachiteHide
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Reference List:
Chukanov, Nikita V., Krivovichev, Sergey V., Pakhomova, Anna S., Pekov, Igor V., Schäfer, Christof, Vigasina, Marina F., Van, Konstantin V. (2014) Laachite, (Ca,Mn)2Zr2Nb2TiFeO14, a new zirconolite-related mineral from the Eifel volcanic region, Germany. European Journal of Mineralogy, 26 (1) 103-111 doi:10.1127/0935-1221/2013/0025-2343
Localities for LaachiteHide
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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
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- 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 (TL) | |
|---|---|
| Rhineland-Palatinate Mayen-Koblenz Mendig Mendig ⓘ In den Dellen quarries (TL) | + +2 other references |
| Russia | |
| Krasnoyarsk Krai Boguchansky District Chadobets alkaline complex ⓘ Chuktukon carbonatite massif | Sharygin +9 other references |
| Murmansk Oblast Khibiny Massif Kukisvumchorr Mt ⓘ Marchenko Peak | Menshikov et al. (2015) |
| Kovdorsky District ⓘ Kovdor Massif | Ivanyuk et al. (2018) |
| ⓘ Kovdor Zheleznyi Mine | Gregory Ivanyuk et al. (2018) |