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Fabrièsite

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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.


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Classification of FabrièsiteHide

Approved
Approval Year:
2012

Physical Properties of FabrièsiteHide

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)

Chemical Properties of FabrièsiteHide

Formula:
Na3Al3Si3O12•2H2O
IMA Formula:
Na3Al3Si3O12 · 2H2O

Crystallography of FabrièsiteHide

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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.21(36)
7.51(32)
4.41(77)
3.41(100)
2.97(70)
2.86(25)
2.61(40)
2.45(29)
Comments:
From Type Description.

Type Occurrence of FabrièsiteHide

General Appearance of Type Material:
Intergrown with nepheline and trinepheline
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:
Tawmaw, Hpakant-Tawmaw Jade Tract, Hpakant Township, Mohnyin District, Kachin State, Myanmar
Associated Minerals at Type Locality:

Synonyms of FabrièsiteHide

Fluorescence of FabrièsiteHide

Not fluorescent in UV

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 FabrièsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ferraris, C., Pont, S., Parodi, G.C., Rondeau, B. and Lorand, J.P. (2013) Fabriesite, IMA 2012-080. CNMNC Newsletter No. 15, February 2013, page 10; Mineralogical Magazine, 77, 1-12.
Ferraris, C., Parodi, G.C., Pont, S., Rondeau, B., Lorand, J.-P. (2014): Trinepheline and fabriesite: two new mineral species from the jadeite deposit of Tawmaw (Myanmar). European Journal of Mineralogy, 26, 257-263.

Internet Links for FabrièsiteHide

Localities for FabrièsiteHide

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.
Myanmar (TL)
 
  • Kachin State
    • Mohnyin District (Moe Hnyin District)
      • Hpakant Township (Hpakan; Phakant; Phakan)
        • Hpakant-Tawmaw Jade Tract
Ferraris, C., Pont, S., Parodi, G.C., Rondeau, B. and Lorand, J.P. (2013) Fabriesite, IMA 2012-080. CNMNC Newsletter No. 15, February 2013, page 10; Mineralogical Magazine, 77, 1-12; Ferraris, C., Parodi, G.C., Pont, S., Rondeau, B., Lorand, J.-P. (2014): Trinepheline and fabriesite: two new mineral species from the jadeite deposit of Tawmaw (Myanmar). European Journal of Mineralogy, 26, 257-263.
Mineral and/or Locality  
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