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Natrolemoynite

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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
© 2005 DM

Show Natrolemoynite Photos (5)
Formula:
Na
 
4
Zr
 
2
Si
 
10
O
 
26
•
 
9
H
 
2
O
System:MonoclinicColour:Colorless to white
Lustre:Sub-Adamantine, VitreousHardness:3
This page provides mineralogical data about Natrolemoynite.

Classification of Natrolemoynite

IMA status:Approved 1996
Nickel-Strunz 10th (pending) edition ID:9.DP.35

9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures
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Type Occurrence of Natrolemoynite

Type Locality:Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
Geological Setting of type material:In pegmatites cutting nepheline syenite.
Associated Minerals at type locality:
ZirconSphaleritePyrochlorePyriteMicrocline
MicroclineMagnetiteLepidocrociteGalenaChlorite Group
CalciteBiotiteAlbite

Physical Properties of Natrolemoynite

Lustre:Sub-Adamantine, Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colorless to white
Streak:White
Hardness (Mohs):3
Tenacity:Brittle
Cleavage:Perfect
{100} and {010} perfect
{001} poor
Fracture:Irregular/Uneven
Density (measured):2.47 g/cm3
Density (calculated):2.5 g/cm3

Crystallography of Natrolemoynite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 10.515Å, b = 16.2534Å, c = 9.1029Å
β = 105.462°
Ratio:a:b:c = 0.647 : 1 : 0.56
Unit Cell Volume:V 1499.4 ų
Z:2
Morphology:{100} {010} and {001} dominant, also minor pinacoid-like forms
Twinning:None mentioned
X-Ray Powder Diffraction:
d-spacingIntensity
8.832 (30)
8.132 (100)
5.975 (40)
3.974 (35)
3.693 (30)
3.564 (40)
3.490 (35)

Optical Data of Natrolemoynite

Type:Biaxial (-)
RI values: nα = 1.533 nβ = 1.559 nγ = 1.567
2V:Measured: 63° , Calculated: 57°
Maximum Birefringence:δ = 0.034

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:crossed axial plain, weak
Pleochroism:Non-pleochroic

Chemical Properties of Natrolemoynite

Formula:
Na
 
4
Zr
 
2
Si
 
10
O
 
26
•
 
9
H
 
2
O
Essential elements:H, Na, O, Si, Zr
All elements listed in formula:H, Na, O, Si, Zr
Analytical Data:Means of nineteen sets of electron microprobe data (with H2O calculated to give 9H2O). Nb appears to be missing from these results when compared with empirical formula.
Na2O (7.47%)
K2O (1.29%)
CaO (0.37%)
MnO (0.12%)
Al2O3 (0.04%)
SiO2 (54.51%)
TiO2 (0.38%)
ZrO2 (21.97%)
H2O (14.72)

Total: 101.88 wt.%
Empirical Formula:
(Na
 
2.67
K
 
0.30
Ca
 
0.07
Mn
 
0.02
)
 
Σ3.06
(Zr
 
1.97
Nb
 
0.08
Ti
 
0.05
)
 
Σ2.10
(Si
 
10.05
Al
 
0.01
)
 
Σ10.06
O
 
25.96
·9.04H
 
2
O

Relationship of Natrolemoynite 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.35Lemoynite
(Na,K)
 
2
CaZr
 
2
Si
 
10
O
 
26
·5H
 
2
O
9.DP.40Altisite
Na
 
3
K
 
6
Ti
 
2
Al
 
2
Si
 
8
O
 
26
Cl
 
3

Other Names for Natrolemoynite

Synonyms:
IMA1996-063
Other Languages:
German:Natrolemoynit
Russian:Натролемуанит
Spanish:Natrolemoynita

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 Natrolemoynite

Reference List:Canadian Mineralogist (2001): 39, 1295-1306.

Internet Links for Natrolemoynite

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    Localities for Natrolemoynite

    Hide Locality List
    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.
    (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
      • Montérégie
        • Rouville RCM
          • Mont Saint-Hilaire
    		Can. Min. 39:1295-1306
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 8th Nov 2009 16:35:29