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Sazhinite-(La)

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Formula:
Na3La[Si6O15] · 2H2O
Colour:
Creamy white; colourless in plane-polarized light
Lustre:
Pearly
Hardness:
3
Crystal System:
Orthorhombic
Member of:
Name:
In allusion to its relationship to Sazhinite-(Ce), and its composition, with lanthanum being the dominant rare earth element cation.
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Classification of Sazhinite-(La)Hide

Approved
Approval Year:
2004
9.EA.30

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings

Physical Properties of Sazhinite-(La)Hide

Pearly
Transparency:
Transparent, Translucent
Colour:
Creamy white; colourless in plane-polarized light
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
parallel to {010} and {001}

Optical Data of Sazhinite-(La)Hide

Type:
Biaxial (+)
RI values:
nα = 1.522 - 1.526 nβ = 1.526 - 1.530 nγ = 1.542 - 1.546
2V:
Measured: 46° , Calculated: 54°
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of Sazhinite-(La)Hide

Formula:
Na3La[Si6O15] · 2H2O
IMA Formula:
Na3LaSi6O15 · 2H2O
Common Impurities:
Ca,K,REE

Crystallography of Sazhinite-(La)Hide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmm2
Cell Parameters:
a = 7.415 Å, b = 15.515 Å, c = 7.164 Å
Ratio:
a:b:c = 0.478 : 1 : 0.462
Unit Cell V:
824.2 ų
Morphology:
Crystals elongated along [001] and flattened on (010), exhibiting the forms {h0l}, {100} and {001}
Twinning:
Not observed

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.42(59)
6.50(48)
5.36(60)
5.26(68)
3.411(100)
3.345(45)
3.252(83)
3.226(45)
Comments:
From type description.

Type Occurrence of Sazhinite-(La)Hide

General Appearance of Type Material:
Small elongate tabular crystals up to 1 mm long and 0.4 mm wide
Geological Setting of Type Material:
In vesicles within a phonolite, together with other species crystallized from late-stage hydrothermal fluids
Associated Minerals at Type Locality:

Synonyms of Sazhinite-(La)Hide

Other Language Names for Sazhinite-(La)Hide

Relationship of Sazhinite-(La) to other SpeciesHide

Member of:
Other Members of this group:
DalyiteK2ZrSi6O15Tric.
DavaniteK2TiSi6O15Tric.
Sazhinite-(Ce)Na2CeSi6O14•6H2O

Common AssociatesHide

Associated Minerals Based on Photo Data:
Tuperssuatsiaite3 photos of Sazhinite-(La) associated with Tuperssuatsiaite on mindat.org.
Sazhinite-(Ce)2 photos of Sazhinite-(La) associated with Sazhinite-(Ce) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EA.05CuprorivaiteCaCuSi4O10Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
9.EA.05GillespiteBaFe2+Si4O10Tet.
9.EA.05EffenbergeriteBaCuSi4O10Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
9.EA.05WesselsiteSrCuSi4O10Tet.
9.EA.10EkaniteCa2ThSi8O20Tet. 4 2 2 : I4 2 2
9.EA.15Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mnc
9.EA.15Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2OTet.
9.EA.15Fluorapophyllite-(Na)NaCa4(Si8O20)F · 8H2OOrth.
9.EA.20MagadiiteNa2Si14O29 · 11H2OMon.
9.EA.25DalyiteK2ZrSi6O15Tric.
9.EA.25DavaniteK2TiSi6O15Tric.
9.EA.30Sazhinite-(Ce)Na2CeSi6O14•6H2O
9.EA.35ArmstrongiteCaZr[Si6O15] · 3H2OMon.
9.EA.40OkeniteCa10Si18O46 · 18H2OTric. 1 : P1
9.EA.45NekoiteCa3Si6O15·7H2OTric. 1 : P1
9.EA.50CavansiteCa(VO)Si4O10 · 4H2OOrth. mmm (2/m 2/m 2/m)
9.EA.55PentagoniteCa(VO)Si4O10 · 4H2OOrth. mm2
9.EA.60PenkvilksiteNa4Ti2Si8O22 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
9.EA.60TumchaiteNa2Zr(Si4O11) · 2H2OMon.
9.EA.65NabesiteNa2BeSi4O10 · 4H2OOrth. 2 2 2 : P21 21 21
9.EA.70Ajoite(K,Na)Cu7AlSi9O24(OH)6 · 3H2OTric.
9.EA.75ZeravshaniteNa2Cs4Zr3[Si18O45]*2H2OMon. 2/m : B2/b
9.EA.80Bussyite-(Ce)(Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4Mon. 2/m : B2/b
9.EA.85PlumbophyllitePb2Si4O10 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn

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 Sazhinite-(La)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Camara, F., Ottolini, L., Devouard, B., Garvie, L. A. J., Hawthorne, F. C. (2006): Sazhinite-(La), Na3LaSi6O15(H2O)2, a new mineral from the Aris phonolite, Namibia: Description and crystal structure. Mineralogical Magazine 70, 405-418.

Internet Links for Sazhinite-(La)Hide

Localities for Sazhinite-(La)Hide

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.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
HORVÁTH, L., and GAULT, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record, 21, 284-359.
      • Lajemmerais RCM
        • Varennes & St-Amable
          • Saint-Amable sill
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118. HORVÁTH, L. (2010) The minerals of the Saint-Amable sill: an update. MICRONEWS 44(4), 23-28.
Namibia (TL)
 
  • Khomas Region
    • Windhoek District
      • Aris
Camara, F., Ottolini, L., Devouard, B., Garvie, L. A. J., Hawthorne, F. C. (2006): Sazhinite-(La), Na3LaSi6O15(H2O)2, a new mineral from the Aris phonolite, Namibia: Description and crystal structure. Mineralogical Magazine 70, 405-418.
Mineral and/or Locality  
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