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Lemoynite

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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada
© Stephan Wolfsried

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Formula:
(Na,K)
 
2
CaZr
 
2
Si
 
10
O
 
26
·5H
 
2
O
System:MonoclinicHardness:4
This page provides mineralogical data about Lemoynite.

Classification of Lemoynite

IMA status:Approved
Strunz 8th edition ID:8/G.09-10
Nickel-Strunz 10th (pending) edition ID:9.DP.35

9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures
Dana 8th edition ID:74.3.3.2

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
Hey's CIM Ref.:14.10.23

14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
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Type Occurrence of Lemoynite

Type Locality:Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada
Year of Discovery:1969

Physical Properties of Lemoynite

Hardness (Mohs):4

Crystallography of Lemoynite

Crystal System:Monoclinic
Cell Parameters:a = 10.38Å, b = 15.94Å, c = 18.6Å
β = 104.59°
Ratio:a:b:c = 0.651 : 1 : 1.167
Unit Cell Volume:V 2,978.26 ų (Calculated from Unit Cell)

Optical Data of Lemoynite

Type:Biaxial (+)
RI values: nα = 1.540 nβ = 1.553 nγ = 1.570
2V:Measured: 80° , Calculated: 84°
Maximum Birefringence:δ = 0.030

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak

Chemical Properties of Lemoynite

Formula:
(Na,K)
 
2
CaZr
 
2
Si
 
10
O
 
26
·5H
 
2
O
Essential elements:Ca, H, Na, O, Si, Zr
All elements listed in formula:Ca, H, K, Na, O, Si, Zr
Common Impurities:Ti,Al,Fe,Nb,Mn,Cu,Zn,Mg,Sr,Rb

Relationship of Lemoynite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.DP.05Meliphanite
(Ca,Na)
 
2
(Be,Al)[Si
 
2
O
 
6
(OH,F)]
9.DP.15Leucosphenite
BaNa
 
4
Ti
 
2
B
 
2
Si
 
10
O
 
30
9.DP.20Prehnite
Ca
 
2
Al
 
2
Si
 
3
O
 
12
(OH)
9.DP.25Amstallite
CaAl(Si,Al)
 
4
O
 
8
(OH)
 
4
·(H
 
2
O,Cl)
9.DP.30Kvanefjeldite
Na
 
4
(Ca,Mn)(Si
 
3
O
 
7
)
 
2
(OH)
 
2
9.DP.35Natrolemoynite
Na
 
4
Zr
 
2
Si
 
10
O
 
26
•
 
9
H
 
2
O
9.DP.40Altisite
Na
 
3
K
 
6
Ti
 
2
Al
 
2
Si
 
8
O
 
26
Cl
 
3
Related Minerals - Hey's Index Grouping:
14.10.1Zircon
Zr[SiO
 
4
]
14.10.2Hafnon
(Hf,Zr)[SiO
 
4
]
14.10.3Zektzerite
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
14.10.4Parakeldyshite
Na
 
2
ZrSi
 
2
O
 
7
14.10.5Vlasovite
Na
 
2
ZrSi
 
4
O
 
11
14.10.6Keldyshite
(Na,H)
 
2
ZrSi
 
2
O
 
7
14.10.7Gaidonnayite
Na
 
2
Zr[Si
 
3
O
 
9
]·2H
 
2
O
14.10.8Terskite
Na
 
4
ZrSi
 
6
O
 
16
·2H
 
2
O
14.10.9Elpidite
Na
 
2
ZrSi
 
6
O
 
15
·3H
 
2
O
14.10.10Hilairite
Na
 
2
Zr[SiO
 
3
]
 
3
·3H
 
2
O
14.10.11Petarasite
Na
 
5
Zr
 
2
[(OH,Cl)|Si
 
6
O
 
18
]·2H
 
2
O
14.10.12Khibinskite
K
 
2
ZrSi
 
2
O
 
7
14.10.13Wadeite
K
 
2
Zr[Si
 
3
O
 
9
]
14.10.14Dalyite
K
 
2
ZrSi
 
6
O
 
15
14.10.15Kostylevite
K
 
2
ZrSi
 
3
O
 
9
·H
 
2
O
14.10.16Umbite
K
 
2
(Zr,Ti)Si
 
3
O
 
9
·H
 
2
O
14.10.17Paraumbite
K
 
3
Zr
 
2
H(Si
 
3
O
 
9
)
 
2
·nH
 
2
O
14.10.18Georgechaoite
NaKZr[Si
 
3
O
 
9
]·2H
 
2
O
14.10.19Gittinsite
CaZr[Si
 
2
O
 
7
]
14.10.20Calciocatapleiite
CaZrSi
 
3
O
 
9
·2H
 
2
O
14.10.21Calciohilairite
CaZr[SiO
 
3
]
 
3
·3H
 
2
O
14.10.22Armstrongite
CaZr[Si
 
6
O
 
15
]·3H
 
2
O
14.10.24Catapleiite
Na
 
2
Zr[Si
 
3
O
 
9
]·2H
 
2
O
14.10.25Baghdadite
Ca
 
3
(Zr,Ti)[O
 
2
|Si
 
2
O
 
7
]
14.10.26Lovozerite
(Na,Ca)
 
3
(Zr,Ti)[Si
 
6
(O,OH)
 
18
]
14.10.27Låvenite
(Na,Ca)
 
2
(Mn
2+
 
,Fe
2+
 
)(Zr,Ti)[(O,OH,F)
 
2
|Si
 
2
O
 
7
]
14.10.28Penkvilksite
(Na,Ca)
 
4
(Ti,Zr)
 
2
Si
 
8
O
 
22
·5H
 
2
O
14.10.29Darapiosite
KNa
 
2
Li(Mn,Zn)
 
2
ZrSi
 
12
O
 
30
14.10.30Bazirite
BaZr[Si
 
3
O
 
9
]
14.10.31Komkovite
BaZr[Si
 
3
O
 
9
]·3H
 
2
O
14.10.32Zirsinalite
Na
 
6
(Ca,Mn
2+
 
,Fe
2+
 
)Zr[Si
 
6
O
 
18
]
14.10.33Tranquillityite
(Fe
2+
 
,Ca)
 
8
(Zr,Y)
 
2
Ti
 
3
[O
 
4
|SiO
 
4
]
 
3

Other Names for Lemoynite

Synonyms:
IMA1968-013
German names:
Lemoynit
Russian names:
Лемуанит
Spanish names:
Lemoynita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lemoynite

Reference List:American Mineralogist (1972): 57: 1913.

Canadian Mineralogist (1976): 132-138.

Mineralogical Record (1990): 21: 318.

Internet Links for Lemoynite

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    Localities for Lemoynite

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    The 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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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Rouville Co.
        • Mont Saint-Hilaire
    		Perrault G., Semenov E.I., Bikova A.V. and Capitonova T.A. (1969), La lemoynite, un nouveau silicate hydrate de zirconium et de sodium de St.-Hilaire, Quebec. Canadian Mineralogist: 9: 585-596; McDonald, A.M. (1997), Lemoynite and lemoynite-like minerals from Mont Saint-Hilaire, Quebec. Rochester Mineralogical Symposium: 187-188.
      • Verchères Co.
        • Varennes & St-Amable
          • Saint-Amable sill
    USA
     
    • New Mexico
      • Otero Co.
        • Cornudas Mountains
    Mineral and/or Locality
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