Fabrièsite
A valid IMA mineral species
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About Fabrièsite
Formula:
Na3Al3Si3O12 · 2H2O
Colour:
White to pale yellow
Lustre:
Sub-Vitreous, Greasy
Hardness:
5 - 5½
Specific Gravity:
2.386 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in 2012 by Cristiano Ferraris, Sylvain Pont, Gian Carlo Parodi, Benjamin Rondeau, and Jean-Pierre Lorand in honor of Jacques Fabriès [April 9, 1932 France – July 22, 2000 France], former professor of the Muséum National d’Histoire Naturelle in Paris (France).
Fabriesite is a pseudomorph after jadeite and occurs as skeletal crystals up to 15–20 μm long and 5–10 μm wide, intergrown with nepheline and trinepheline.
Unique Identifiers
Mindat ID:
43600
Long-form identifier:
mindat:1:1:43600:7
GUID
(UUID V4):
(UUID V4):
7feca9e8-0fd5-4f78-a919-de5e887365a1
IMA Classification of Fabrièsite
Classification of Fabrièsite
9.GB.05
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
B : Chains of single connected 4-membered rings
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
B : Chains of single connected 4-membered rings
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Fab | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Fab | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Fabrièsite
Sub-Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
White to pale yellow
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Density:
2.386 g/cm3 (Calculated)
Optical Data of Fabrièsite
Type:
Biaxial (-)
RI values:
nα = 1.503 nβ = 1.506 nγ = 1.508
2V:
Calculated: 78°
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Non-pleochroic
Comments:
The optical parameters are for synthetic nepheline
hydrate I. The calculated mean refractive index is 1.511.
hydrate I. The calculated mean refractive index is 1.511.
Chemistry of Fabrièsite
Mindat Formula:
Na3Al3Si3O12 · 2H2O
Crystallography of Fabrièsite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmm2
Cell Parameters:
a = 16.4260 Å, b = 15.0140 Å, c = 5.2235 Å
Ratio:
a:b:c = 1.094 : 1 : 0.348
Unit Cell V:
1,288.22 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.21 Å | (36) |
| 7.51 Å | (32) |
| 4.41 Å | (77) |
| 3.41 Å | (100) |
| 2.97 Å | (70) |
| 2.86 Å | (25) |
| 2.61 Å | (40) |
| 2.45 Å | (29) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Fabrièsite
General Appearance of Type Material:
Skeletal allotriomorphic crystals up to 15–20 μm long and 5–10 μm wide.
Place of Conservation of Type Material:
Muséum National d’Histoire Naturelle (MNHN) of Paris, France, registration number MNHN 212-001.
Geological Setting of Type Material:
Late-stage metamorphic veins of a jadeite deposit. Intergrown with nepheline and trinepheline.
Associated Minerals at Type Locality:
Synonyms of Fabrièsite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Fabrièsite associated with Trinepheline | NaAlSiO4 |
| 2 photos of Fabrièsite associated with Nepheline | Na3K(Al4Si4O16) |
| 2 photos of Fabrièsite associated with Chromojadeite | Na(Al,Cr)Si2O6 |
| 2 photos of Fabrièsite associated with Banalsite | Na2BaAl4Si4O16 |
| 2 photos of Fabrièsite associated with Stronalsite | Na2SrAl4Si4O16 |
| 2 photos of Fabrièsite associated with Albite | Na(AlSi3O8) |
| 2 photos of Fabrièsite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 9.GB.05 | Ammonioleucite | (NH4)(AlSi2O6) |
| 9.GB.05 | Analcime | Na(AlSi2O6) · H2O |
| 9.GB.05 | Hsianghualite | Ca3Li2(Be3Si3O12)F2 |
| 9.GB.05 | Lithosite | K6Al4Si8O25 · 2H2O |
| 9.GB.05 | Leucite | K(AlSi2O6) |
| 9.GB.05 | Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| 9.GB.05 | Wairakite | Ca(Al2Si4O12) · 2H2O |
| 9.GB.05 va | Germanate-analcime | NaAlGe2O6 · H2O |
| 9.GB.05 va | Germanate-leucite | KAlGe2O6 |
| 9.GB.05 | Kirchhoffite | Cs(BSi2O6) |
| 9.GB.10 | Laumontite | CaAl2Si4O12 · 4H2O |
| 9.GB.15 | Yugawaralite | CaAl2Si6O16 · 4H2O |
| 9.GB.20 | Roggianite | Ca2Be(OH)2Al2Si4O13 · 2.5H2O |
| 9.GB.25 | Goosecreekite | Ca[Al2Si6O16] · 5H2O |
| 9.GB.30 | Montesommaite | (K,Na)9Al9Si23O64 · 10H2O |
| 9.GB.35 | Parthéite | Ca2(Si4Al4) O15 (OH)2 · 4H2O |
Fluorescence of Fabrièsite
Not fluorescent in UV
Other Information
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 Fabrièsite
mindat.org URL:
https://www.mindat.org/min-43600.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Fabrièsite
Localities for Fabrièsite
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.
Myanmar (TL) | |
| Williams et al. (2013) +2 other references |
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Tawmaw, Hpakant-Tawmaw Jade Tract, Hpakant Township, Mohnyin District, Kachin State, Myanmar