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Lalondeite

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About LalondeiteHide

02302420014946782263010.jpg
Dr André 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 André 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.


Classification of LalondeiteHide

Approved
Approval Year:
2002
First Published:
2009
9.EE.85

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

Physical Properties of LalondeiteHide

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

Chemical Properties of LalondeiteHide

Formula:
(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2O
IMA Formula:
(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2O

Crystallography of LalondeiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 9.589 Å, b = 9.613 Å, c = 12.115 Å
α = 96.62°, β = 92.95°, γ = 119.81°
Ratio:
a:b:c = 0.998 : 1 : 1.26
Unit Cell V:
954.82 ų (Calculated from Unit Cell)
Z:
2

Type Occurrence of LalondeiteHide

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)

Synonyms of LalondeiteHide

Related Minerals - Nickel-Strunz GroupingHide

9.EE.CairncrossiteSr2Ca7–xNa2x(Si4O10)4(OH)2(H2O)15–x (with 0 <= x <= 1)Tric. 1 : P1
9.EE.05BementiteMn7Si6O15(OH)8Mon.
9.EE.10BrokenhilliteMn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig.
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.15Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Mon.
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite(Mg,Al)2Si4O10(OH) · 4H2OMon. 2/m : B2/m
9.EE.20TuperssuatsiaiteNa2(Fe3+,Mn2+)3Si8O20(OH)2 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn5Si8O20(OH)2 · 8-9H2OMon. 2/m : B2/m
9.EE.20WindhoekiteCa2Fe3+2.67[Si8O20](OH)4 · 10H2O Mon. 2/m : B2/m
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth.
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric.
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric. 1 : P1
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6Tric. 1 : P1
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig.
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.40NatrosiliteNa2Si2O5Mon.
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth.
9.EE.55RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 2 2 2 : C2 2 2
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
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,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4H2OTric. 1 : P1

Fluorescence of LalondeiteHide

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

Other InformationHide

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 LalondeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Grice, J.D., Ferraris, G. (2003) New minerals approved in 2002 and nomenclature modifications approved 1998-2002 by the commission on new minerals and mineral names, International Mineralogical Association. American Mineralogist: 88: 1620-1624.
Grice, J.D., Ferraris, G. (2003) New minerals approved in 2002 and nomenclature modifications approved in 1998-2002 by the Commission on the New Minerals and Mineral Names, International Mineralogical Association. The Canadian Mineralogist: 41: 795-802.
McDonald, A.M. and Chao, G.Y. (2009) Lalondeite, a new hydrated Na-Ca fluorosilicate species from Mont Saint-Hilaire, Quebec: Description and crystal structure. Canadian Mineralogist: 47: 181-191.
Piilonen, P.C., Poirier, G., Tait, K.T. (2009) New mineral names. American Mineralogist: 94: 1495-1501.

Internet Links for LalondeiteHide

Localities for LalondeiteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
McDONALD, A.M., and CHAO, G.Y. (2009) Lalondeite, a new hydrated Na-Ca fluorosilicate species from Mont Saint-Hilaire Quebec: description and crystal structure. Canadian Mineralogist, 47, 181-192.
 
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