Mindat Logo
Home Page Log In Messageboard The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Sazhinite-(La)

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek District, Khomas Region, Namibia
© Leon Hupperichs

Show Sazhinite-(La) Photos (5)



Formula:
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
System:OrthorhombicColour:Creamy white; colourless ...
Hardness:3
Name:In allusion to its relationship to Sazhinite-(Ce), and its composition, with lanthanum being the dominant rare earth element cation.


Dalyite Group.
The La analogue of sazhinite-(Ce).

See also Unnamed (Sazhinite-related mineral I)and Unnamed (Sazhinite-related mineral II).

Classification of Sazhinite-(La)

IMA status:Approved 2004
Strunz 8th edition ID:8/H.31-20
Nickel-Strunz 10th (pending) edition ID:9.EA.30

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
mindat.org URL:http://www.mindat.org/min-27499.html
Please feel free to link to this page.

Type Occurrence of Sazhinite-(La)

Type Locality:Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek District, Khomas Region, Namibia
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:
VilliaumiteTuperssuatsiaiteSphaleriteQuartzNatrolite
MicroclineMakatiteKorobitsyniteKanemiteHydroxylapatite
GalenaFluoriteEudialyteApophylliteAnalcime
Aegirine

Physical Properties of Sazhinite-(La)

Lustre:Pearly
Diaphaneity (Transparency):Transparent, Translucent
Colour:Creamy white; colourless in plane-polarized light
Streak:White
Hardness (Mohs):3
Tenacity:Brittle
Cleavage:Distinct/Good
parallel to {010} and {001}

Crystallography of Sazhinite-(La)

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Pmm2
Cell Parameters:a = 7.415Å, b = 15.515Å, c = 7.164Å
Ratio:a:b:c = 0.478 : 1 : 0.462
Unit Cell Volume: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 Diffraction:
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.

Optical Data of Sazhinite-(La)

Type:Biaxial (+)
RI values: nα = 1.522 - 1.526 nβ = 1.526 - 1.530 nγ = 1.542 - 1.546
2V:Measured: 46° , Calculated: 54°
Maximum Birefringence:δ = 0.020

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Sazhinite-(La)

Formula:
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
Essential elements:H, La, Na, O, Si
All elements listed in formula:H, La, Na, O, Si
Analytical Data:Average composition determined by electron probe microanalysis (EPMA) and secondary ion mass spectrometry (SIMS)
Empirical Formula:
(Na
 
2.87
K
 
0.02
Sr
 
0.01
)
 
=2.90
{La
 
0.41
Ce
 
0.35
Pr
 
0.02
Nd
 
0.04
(Sm,Gd,Dy,Er,Yb)
 
0.01
Th
 
0.09
U
 
0.01
Y
 
0.01
Zr
 
0.01
Ca
 
0.08
Li
 
0.01
}
 
=1.04
(Si
 
5.87
S
 
0.06
B
 
0.01
)(O
 
14.86
F
 
0.14
)  ·  2H
 
2
O
Common Impurities:Ca,K,REE
Relationship of Sazhinite-(La) to other Species
Structurally related to group(s):
Dalyite Group
Related Minerals - Nickel-Strunz Grouping):

- + 
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
 · 3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
] · 3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
 · 2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.60Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
 · 4H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
) · 2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
AlSi
 
9
O
 
24
(OH)
 
6
 · 3H
 
2
O
9.EA.75Zeravshanite
Na
 
2
Cs
 
4
Zr
 
3
[Si
 
18
O
 
45
]*2H
 
2
O
9.EA.80Bussyite-(Ce)
(Ce,REE)
 
3
(Na,H
 
2
O)
 
6
MnSi
 
9
Be
 
5
(O,OH)
 
30
F
 
4
9.EA.85Plumbophyllite
Pb
 
2
Si
 
4
O
 
10
 · H
 
2
O
Other Names for Sazhinite-(La)
Synonyms:
IMA2002-042a
Other Languages:
Russian:Сажинит-(La)
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 Sazhinite-(La)
Reference List:

- + 
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)
Search Engines:












  • Look for Sazhinite-(La) on Google
    • 


  • Look for Sazhinite-(La) images on Google
    • External Links:
  • Look for Sazhinite-(La) on Webmineral
  • Look for Sazhinite-(La) on Athena Mineralogy
  • Look for Sazhinite-(La) on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • High-end worldwide specimens & outstanding customer service
  • Buy from David K Joyce minerals
  • Fine and rare minerals from mintreasure.com
  • Wilensky Fine Minerals
  • Find Sazhinite-(La) on www.crystalclassics.co.uk
  • Search for minerals at Heliodor
  • Buy fine minerals and gemstones from Pala International
  • Sazhinite-(La) specimens for sale - minfind.com
  • Fine Minerals from Weinrich Minerals, Inc.
  • The Arkenstone - Fine Minerals
    • Jobs:
  • Mining & Geology Jobs
    • Localities for Sazhinite-(La)
    






    


    

    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.

    

    

    
Hide Locality List
     		

    (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
    

        • 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.
    



        • Rouville RCM
    

          • Mont Saint-Hilaire
    
    		HORVÁTH, L., and GAULT, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record, 21, 284-359.
    Namibia
     
    

    • 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

    

    
 
    Search Google
 
 
 
 
 
 
 
    
 
    

  
 

 
 
 

 
 
 
 
 

    




    Copyright © Jolyon Ralph and Ida Chau 1993-2013.  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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here
to register.
    Current server date and time: 1st Jan 2013 09:13:46     

    

    
		

    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds