Natrolemoynite
A valid IMA mineral species
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About Natrolemoynite
Formula:
Na4Zr2Si10O26 · 9H2O
Colour:
colorless to white (occasionally with a slightly pink to red tinge)
Lustre:
Sub-Adamantine, Vitreous
Hardness:
3
Specific Gravity:
2.47
Crystal System:
Monoclinic
Name:
Named for being the 'Na-dominant polymorph of lemoynite'.
This page provides mineralogical data about Natrolemoynite.
Unique Identifiers
Mindat ID:
11005
Long-form identifier:
mindat:1:1:11005:7
IMA Classification of Natrolemoynite
Approved
IMA Formula:
Na4Zr4+2Si10O26(H2O)7·2H2O
Approval year:
1996
First published:
2001
Classification of Natrolemoynite
9.DP.35
9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures
9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Nlm | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Natrolemoynite
Sub-Adamantine, Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless to white (occasionally with a slightly pink to red tinge)
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{100} and {010} perfect
{001} poor
{100} and {010} perfect
{001} poor
Fracture:
Irregular/Uneven
Density:
2.47 g/cm3 (Measured) 2.50 g/cm3 (Calculated)
Optical Data of Natrolemoynite
Type:
Biaxial (-)
RI values:
nα = 1.533(1) nβ = 1.559(1) nγ = 1.567(1)
2V:
Measured: 63° (1), Calculated: 57°
Max. Birefringence:
δ = 0.034
Based on recorded range of RI values above.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Low (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
crossed axial plain, weak
Pleochroism:
Non-pleochroic
Chemistry of Natrolemoynite
Mindat Formula:
Na4Zr2Si10O26 · 9H2O
Element Weights:
Crystallography of Natrolemoynite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 10.515 Å, b = 16.2534 Å, c = 9.1029 Å
β = 105.462°
β = 105.462°
Ratio:
a:b:c = 0.647 : 1 : 0.56
Unit Cell V:
1499.4 ų
Z:
2
Morphology:
{100} {010} and {001} dominant, also minor pinacoid-like forms
Twinning:
None mentioned
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
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2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
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Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005740 | Natrolemoynite | McDonald A M, Chao G Y (2001) Natrolemoynite, a new hydrated sodiium zirconosilicate from Mont Saint-Hilaire, Quebec: Description and structure determination The Canadian Mineralogist 39 1295-1306 |  | 2001 | Mont Saint-Hilaire, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.832 Å | (30) |
| 8.132 Å | (100) |
| 5.975 Å | (40) |
| 3.974 Å | (35) |
| 3.693 Å | (30) |
| 3.564 Å | (40) |
| 3.490 Å | (35) |
| 2.804 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Natrolemoynite
General Appearance of Type Material:
Bladed to prismatic crystals to 1x2 mm, typically forming compact radial aggregates.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, catalogue number CNMMI 81534
Geological Setting of Type Material:
In pegmatites cutting nepheline syenite.
Associated Minerals at Type Locality:
Synonyms of Natrolemoynite
Other Language Names for Natrolemoynite
Dutch:Natrolemoyniet
German:Natrolemoynit
Russian:Натролемуанит
Simplified Chinese:水硅锆钠石
Spanish:Natrolemoynita
Traditional Chinese:水矽鋯鈉石
Common Associates
Associations Based on Photo Data:
| 3 photos of Natrolemoynite associated with Lemoynite | (Na,K)2CaZr2Si10O26 · 5H2O |
| 2 photos of Natrolemoynite associated with Lepidocrocite | Fe3+O(OH) |
| 1 photo of Natrolemoynite associated with Monazite-(Ce) | Ce(PO4) |
Related Minerals - Strunz-mindat Grouping
| 9.DP.05 | Meliphanite | (Ca,Na)2(Be,Al)[Si2O6(OH,F)] |
| 9.DP.15 | Leucosphenite | BaNa4Ti2B2Si10O30 |
| 9.DP.20 | Ferriprehnite | Ca2Fe3+(Si3AlO10)(OH)2 |
| 9.DP.20 | Prehnite | Ca2Al2Si3O10(OH)2 |
| 9.DP.25 | Amstallite | CaAl[(Al,Si)4O8(OH)2](OH)2 · (H2O,Cl) |
| 9.DP.30 | Kvanefjeldite | Na4(Ca,Mn)(Si3O7)2(OH)2 |
| 9.DP.35 | Lemoynite | (Na,K)2CaZr2Si10O26 · 5H2O |
| 9.DP.35 | Hogarthite | (Na,K)2CaTi2Si10O26 · 8H2O |
| 9.DP.40 | Altisite | Na3K6Ti2Al2Si8O26Cl3 |
| 9.DP.45 | Chiappinoite-(Y) | Y2Mn(Si3O7)4 |
| 9.DP.50 | Esquireite | BaSi6O13 · 7H2O |
| 9.DP.55 | Lavinskyite | K(LiCu)Cu6(Si4O11)2(OH)4 |
| 9.DP.55 | Plancheite | Cu8(Si8O22)(OH)4 · H2O |
Fluorescence of Natrolemoynite
No fluorescence in either short- or long-wave ultraviolet radiation.
Other Information
Notes:
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 Natrolemoynite
mindat.org URL:
https://www.mindat.org/min-11005.html
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References for Natrolemoynite
Reference List:
Perrault, G., Semenov, E. I., Bikova, A. V., Captinova, T. A. (1969) La lemoynite, un nouveau silicate hydraté de Zirconium et de sodium de St. Hilaire, Québec. The Canadian Mineralogist, 9 (5) 585-596
Localities for Natrolemoynite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada (TL) | |
| McDonald et al. (2001) |
Russia | |
| Pavel M. Kartashov analytical data (2012) |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada