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Lalondeite

A valid IMA mineral species
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04215740017271948826632.jpg
Lalondeite

Poudrette quarry, Mont Saint-Hilaire, La VallÃĐe-du-Richelieu RCM, MontÃĐrÃĐgie, QuÃĐbec, Canada
04215740017271948826632.jpg
Lalondeite

Poudrette quarry, Mont Saint-Hilaire, La VallÃĐe-du-Richelieu RCM, MontÃĐrÃĐgie, QuÃĐbec, Canada
04215740017271948826632.jpg
Lalondeite

Poudrette quarry, Mont Saint-Hilaire, La VallÃĐe-du-Richelieu RCM, MontÃĐrÃĐgie, QuÃĐbec, Canada
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About LalondeiteHide

05446770017271948839054.jpg
Dr AndrÃĐ Lalonde at Rochester
Formula:
(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2O
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.50
Crystal System:
Triclinic
Name:
Named by Andrew M. McDonald and George Y. Chao in honor of Dr AndrÃĐ Edmond Lalonde (1955, Ottawa, Ontario, Canada - 21 December 2012) Professor of Mineralogy at the University of Ottawa, Canada. His interest lay in phyllosilicates. He was especially known for his teaching abilities.
This page provides mineralogical data about Lalondeite.


Unique IdentifiersHide

Mindat ID:
27638
Long-form identifier:
mindat:1:1:27638:0

IMA Classification of LalondeiteHide

IMA status:
Approved
IMA Formula:
(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2O
Approval year:
2002
First published:
2009

Classification of LalondeiteHide

Strunz-mindat (2026):
9.EE.85

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands

Mineral SymbolsHide

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

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

Physical Properties of LalondeiteHide

Lustre:
Vitreous
Transparency:
Transparent
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Fracture:
Splintery
Density:
2.50 g/cm3 (Measured)    2.51 g/cm3 (Calculated)

Optical Data of LalondeiteHide

Type:
Biaxial (-)
RI values:
nα = 1.522(1) nβ = 1.528(1) nγ = 1.529(1)
2V:
Measured: 48° (1), Calculated: 44°
Max. Birefringence:
δ = 0.007
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 Âĩm 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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Moderate
Dispersion:
None.
Optical Extinction:
X ~ c.
Pleochroism:
Non-pleochroic

Chemistry of LalondeiteHide

Mindat Formula:
(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2O
Element Weights:
Element% weight
O46.604 %
Si31.925 %
Na9.800 %
Ca8.542 %
F2.700 %
H0.430 %

Calculated from ideal end-member formula.
Elements listed:
Ca, F, H, Na, O, Si - search for minerals with similar chemistry

Crystallography of LalondeiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 9.589(2) Å, b = 9.613(2) Å, c = 12.115(2) Å
α = 96.62(2)°, β = 92.95(2)°, γ = 119.81(2)°
Ratio:
a:b:c = 0.998 : 1 : 1.26
Unit Cell V:
954.82 ÅÂģ (Calculated from Unit Cell)
Z:
2
Morphology:
The pinacoid (001} was the only form observed.
Twinning:
No twinning.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0006279LalondeiteMcDonald A M, Chao G Y (2009) Lalondeite, a new hydrated Na-Ca fluorosilicate species from Mont Saint-Hilaire, Quebec: Description and crystal structure The Canadian Mineralogist 47 181-1912009Poudrette quarry, Mont Saint-Hilaire, Quesbec, Canada0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.938 Å(90)
4.142 Å(30)
4.106 Å(30)
3.972 Å(40)
2.981 Å(35)
2.967 Å(50)
2.888 Å(100)
Locality:
Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; CarriÃĻre Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La VallÃĐe-du-Richelieu RCM, MontÃĐrÃĐgie, QuÃĐbec, Canada
Comments:
Poudrette Quarry, Canada. Data are from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
22 : Hydration and low-? subsurface aqueous alteration (see also #23)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of LalondeiteHide

Type Locality:
ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; CarriÃĻre Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La VallÃĐe-du-Richelieu RCM, MontÃĐrÃĐgie, QuÃĐbec, Canada
General Appearance of Type Material:
Elongated aggregates of densely packed, randomly oriented crystals
Place of Conservation of Type Material:
Canadian Museum of Nature, Aylmer, Quebec, Canada (catalogue no. CMNMC 83720)
Geological Setting of Type Material:
Altered breccia or marble within an alkaline igneous intrusion.
Associated Minerals at Type Locality:
Microcline'Clinoamphibole'

Synonyms of LalondeiteHide

Other Language Names for LalondeiteHide

German:Lalondeit

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Lalondeite associated with CharmariteMn2+4Al2(OH)12[CO3] · 3H2O
1 photo of Lalondeite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

9.EE.CairncrossiteSr2Ca7-xNa2x(Si4O10)4(OH)2(H2O)15-xTric. 1 : P1
9.EE.05BementiteMn7Si6O15(OH)8Mon.
9.EE.07InnsbruckiteMn33(Si2O5)14(OH)38Mon. m : Bm
9.EE.10'Brokenhillite'Mn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig. 3m(32/m) : P3m1
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m(32/m) : P3m1
9.EE.15NeleniteMn2+16As3+3Si12O36(OH)17Trig. 3m(32/m) : R3m
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskiteâ—ŧAl2Mg2â—ŧ2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn2+Mn2+2Mn2+2â—ŧ2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20WindhoekiteFe3+(Fe3+1.67â—ŧ0.33)Ca2â—ŧ2Si8O20(OH)2(H2O)4(OH)2 · 6H2OMon. 2/m : B2/m
9.EE.20Windmountainiteâ—ŧFe3+2Mg2â—ŧ2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20IkorskyiteKMn3+(Si4O10) · 3H2OMon. 2/m : P21/b
9.EE.20TuperssuatsiaiteFe3+Fe3+2(Naâ—ŧ)â—ŧ2Si8O20(OH)2(H2O)4 · 2H2OMon. 2/m : B2/m
9.EE.20'Unnamed (Na-Ca-Fe-Silicate-Hydrate)'NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2OTric. 1 : P1
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm(2/m2/m2/m) : Pnna
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth. mmm(2/m2/m2/m)
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric. 1 : P1
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6Tric. 1 : P1
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric. 1 : P1
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig. 3 : P3
9.EE.35KodamaiteNa3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2OTric. 1 : P1
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.40NatrosiliteNa2Si2O5Mon. 2/m : P21/b
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth. mmm(2/m2/m2/m) : Cmcm
9.EE.55RaiteMn2+Mn2+2Na2(â—ŧ1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6Orth. 222 : C222
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig. 3m
9.EE.65ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig. 3m : P31c
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
9.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.
9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2OTric. 1 : P1
9.EE.80Martinite(Na,â—ŧ,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2 · 4H2OTric. 1 : P1
9.EE.80EllingseniteNa5Ca6Si18O38(OH)13 · 6H2OTric. 1 : P1

Fluorescence of LalondeiteHide

In UV light:
Long wave UV - None
Medium Wave UV - Medium to strong violet-blue
Short Wave UV - Weak violet to violet-blue

Other InformationHide

IR Spectrum:
Absorption bands in the IR spectrum include 3443, 1631 and 1025 cm–1 (shoulder at 1121 cm–1) with four bands in the region of 787–388 cm–1.
Notes:
The mineral does not effervesce in 1:1 HCl at room temperature.
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 LalondeiteHide

References for LalondeiteHide

Localities for LalondeiteHide

Showing 1 localities.

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.
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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.
Canada (TL)
 
  • QuÃĐbec
    • MontÃĐrÃĐgie
      • La VallÃĐe-du-Richelieu RCM
        • Mont Saint-Hilaire
McDonald et al. (2009)
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