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⇱ Laplandite-(Ce): Mineral information, data and localities.

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Laplandite-(Ce)

A valid IMA mineral species
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About Laplandite-(Ce)Hide

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Formula:
Na4CeTiPO4Si7O18 · 5H2O
Colour:
Gray-white, pale yellow, pale blue
Lustre:
Vitreous, Greasy
Hardness:
2 - 3
Specific Gravity:
2.83
Crystal System:
Orthorhombic
Name:
For Lappland (Lapland), the region in which the Kola Peninsula lies.
This page provides mineralogical data about Laplandite-(Ce).


Unique IdentifiersHide

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Mindat ID:
2331
Long-form identifier:
mindat:1:1:2331:9

IMA Classification of Laplandite-(Ce)Hide

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Approved
IMA Formula:
Na4CeTiPSi7O22 · 5H2O
First published:
1974

Classification of Laplandite-(Ce)Hide

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9.DJ.10

9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains
78.7.9.1

78 : Unclassified Silicates
7 :
17.6.10

17 : Silicates Containing other Anions
6 : Silicates with phosphate

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.

SymbolSourceReference for Standard
Lpl-CeIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Laplandite-(Ce)Hide

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Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
Gray-white, pale yellow, pale blue
Hardness:
2 - 3 on Mohs scale
Fracture:
Splintery
Density:
2.83 g/cm3 (Measured)    2.71 g/cm3 (Calculated)

Optical Data of Laplandite-(Ce)Hide

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Type:
Biaxial (-)
RI values:
nα = 1.568 nβ = 1.584 nγ = 1.585
2V:
Measured: 28° , Calculated: 26°
Max. Birefringence:
δ = 0.017
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.

Surface Relief:
Moderate
Dispersion:
r > v strong

Chemistry of Laplandite-(Ce)Hide

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Mindat Formula:
Na4CeTiPO4Si7O18 · 5H2O
Element Weights:
Element% weight
O45.492 %
Si20.704 %
Ce14.756 %
Na9.684 %
Ti5.041 %
P3.262 %
H1.062 %

Calculated from ideal end-member formula.

Crystallography of Laplandite-(Ce)Hide

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Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pmmm
Setting:
Pmmm
Cell Parameters:
a = 7.27 Å, b = 14.38 Å, c = 22.25 Å
Ratio:
a:b:c = 0.506 : 1 : 1.547
Unit Cell V:
2,326.07 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Radial-fibrous aggregates.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
7.27 Å(100)
3.76 Å(100)
3.35 Å(100)
3.03 Å(100)
3.36 Å(80)
2.80 Å(80)
6.47 Å(70)

Geological EnvironmentHide

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Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of Laplandite-(Ce)Hide

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General Appearance of Type Material:
Radiating-fibrous deposits up to 0.5-1 cm and fan-shaped platy aggregates; the plates about 0.01 mm thick are flattened on the c axis.
Place of Conservation of Type Material:
Institute of Mineralogy and Geochemistry of Rare Elements, Moscow, Russia.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 75512, 76312.
Geological Setting of Type Material:
Natrolite zone of a pegmatite in a differentiated alkalic massif.
Associated Minerals at Type Locality:

Synonyms of Laplandite-(Ce)Hide

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Other Language Names for Laplandite-(Ce)Hide

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Simplified Chinese:硅钛铈钠石

Common AssociatesHide

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Associations Based on Photo Data:
1 photo of Laplandite-(Ce) associated with ManganoneptuniteKNa2Li(Mn2+)2Ti2[Si4O12]2
1 photo of Laplandite-(Ce) associated with Sazhinite-(Ce)Na3CeSi6O15 · 2H2O
1 photo of Laplandite-(Ce) associated with SeranditeNaMn2+2Si3O8(OH)

Related Minerals - Strunz-mindat GroupingHide

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9.DJ.05NarsarsukiteNa2(Ti,Fe3+)Si4(O,F)11Tet. 4/m : I4/m
9.DJ.15Caysichite-(Y)(Ca,Yb,Er)4Y4(Si8O20)(CO3)6(OH) · 7H2OOrth. mm2 : Cmc21
9.DJ.20Seidite-(Ce)Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2OMon. 2/m : B2/b
9.DJ.25Carlosturanite(Mg,Fe,Ti)21(Si,Al)12O28(OH)34 · H2OMon. m : Bm
9.DJ.30JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2OMon. 2/m : P2/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 Laplandite-(Ce)Hide

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mindat.org URL:
https://www.mindat.org/min-2331.html
Please feel free to link to this page.

References for Laplandite-(Ce)Hide

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Localities for Laplandite-(Ce)Hide

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Showing 2 localities.

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

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- 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.
China
  • Inner Mongolia
    • Hohhot City (Huhehaote Prefecture)
      • Wuchuan County
Fengjun Nie et al. (2013)
Russia (TL)
  • Murmansk Oblast
    • Lovozersky District
      • Karnasurt Mountain
Es’kova et al. (1974) +1 other reference
Quick NavTopAbout Laplandite-(Ce)Unique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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