Sazhinite-(La)
A valid IMA mineral species
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About Sazhinite-(La)
Formula:
Na3La[Si6O15] · 2H2O
Colour:
Creamy white; colourless in plane-polarized light
Lustre:
Pearly
Hardness:
3
Specific Gravity:
2.64 (Calculated)
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.
Type Locality:
The La analogue of sazhinite-(Ce).
See also Unnamed (Sazhinite-related mineral I)and Unnamed (Sazhinite-related mineral II).
See also Unnamed (Sazhinite-related mineral I)and Unnamed (Sazhinite-related mineral II).
Unique Identifiers
Mindat ID:
27499
Long-form identifier:
mindat:1:1:27499:3
GUID
(UUID V4):
(UUID V4):
1f37444e-fb0c-4982-8ab4-68f9a7421284
IMA Classification of Sazhinite-(La)
Classification of Sazhinite-(La)
9.EA.30
9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-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.
Symbol | Source | Reference |
---|---|---|
Szi-La | 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 Sazhinite-(La)
Pearly
Transparency:
Transparent, Translucent
Colour:
Creamy white; colourless in plane-polarized light
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Parallel to {010} and {001}
Parallel to {010} and {001}
Density:
2.64 g/cm3 (Calculated)
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°
Max Birefringence:
δ = 0.020
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
Optical Extinction:
X = c; Y = b; Z = a.
Chemistry of Sazhinite-(La)
Mindat Formula:
Na3La[Si6O15] · 2H2O
Common Impurities:
Ca,K,REE
Crystallography of Sazhinite-(La)
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.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0014578 | Sazhinite-(La) | 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, Nambia: description and crystal structure Mineralogical Magazine 70 405-418 | 2006 | Aris phonolite, Nambia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.42 Å | (59) |
6.50 Å | (48) |
5.36 Å | (60) |
5.26 Å | (68) |
3.411 Å | (100) |
3.345 Å | (45) |
3.252 Å | (83) |
3.226 Å | (45) |
Comments:
From type description.
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 Sazhinite-(La)
General Appearance of Type Material:
Small elongate tabular crystals up to 1 mm long and 0.4 mm wide.
Place of Conservation of Type Material:
n.d.
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)
Other Language Names for Sazhinite-(La)
German:Sazhinit-(La)
Russian:Сажинит-(La)
Relationship of Sazhinite-(La) to other Species
Member of:
Other Members of this group:
Dalyite | K2ZrSi6O15 | Tric. 1 : P1 |
Davanite | K2TiSi6O15 | Tric. |
Sazhinite-(Ce) | Na2CeSi6O14 · 6H2O | Orth. mm2 : Pmm2 |
Common Associates
Associated Minerals Based on Photo Data:
7 photos of Sazhinite-(La) associated with Tuperssuatsiaite | Fe3+Fe3+2(Na◻)◻2Si8O20(OH)2(H2O)4 · 2H2O |
2 photos of Sazhinite-(La) associated with Sazhinite-(Ce) | Na2CeSi6O14 · 6H2O |
1 photo of Sazhinite-(La) associated with Ferroceladonite | K(Fe2+Fe3+◻)(Si4O10)(OH)2 |
Related Minerals - Strunz-mindat Grouping
9.EA. | Bussyite-(Y) | (Y,REE,Ca)3(Na,Ca)6MnSi9Be5(O,OH,F)34 |
9.EA. | Fluorapophyllite-(NH₄) | NH4Ca4(Si8O20)F · 8H2O |
9.EA. | Hydroxymcglassonite-(K) | KSr4Si8O20(OH) · 8H2O |
9.EA.05 | Cuprorivaite | CaCuSi4O10 |
9.EA.05 | Gillespite | BaFe2+Si4O10 |
9.EA.05 | Effenbergerite | BaCuSi4O10 |
9.EA.05 | Wesselsite | SrCuSi4O10 |
9.EA.07 | Fluorapophyllite-(Cs) | CsCa4(Si8O20)F · 8H2O |
9.EA.10 | Ekanite | Ca2ThSi8O20 |
9.EA.15 | Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
9.EA.15 | Hydroxyapophyllite-(K) | KCa4(Si8O20)(OH,F) · 8H2O |
9.EA.15 | Fluorapophyllite-(Na) | NaCa4(Si8O20)F · 8H2O |
9.EA.20 | Magadiite | Na2Si14O29 · 11H2O |
9.EA.25 | Dalyite | K2ZrSi6O15 |
9.EA.25 | Davanite | K2TiSi6O15 |
9.EA.30 | Sazhinite-(Ce) | Na2CeSi6O14 · 6H2O |
9.EA.35 | Armstrongite | CaZr[Si6O15] · 3H2O |
9.EA.40 | Okenite | Ca10Si18O46 · 18H2O |
9.EA.45 | Nekoite | Ca3Si6O15 · 7H2O |
9.EA.45 | Perettiite-(Y) | Y2Mn4FeSi2B8O24 |
9.EA.45 | Badakhshanite-(Y) | Y2Mn4Al(Si2B7BeO24) |
9.EA.47 | Shlykovite | KCa[Si4O9(OH)] · 3H2O |
9.EA.50 | Cavansite | Ca(VO)Si4O10 · 4H2O |
9.EA.50 | Diegogattaite | Na2CaCu2Si8O20 · H2O |
9.EA.52 | Yangite | PbMnSi3O8 · H2O |
9.EA.55 | Pentagonite | Ca(VO)Si4O10 · 4H2O |
9.EA.60 | Penkvilksite | Na4Ti2Si8O22 · 4H2O |
9.EA.60 | Tumchaite | Na2Zr(Si4O11) · 2H2O |
9.EA.65 | Nabesite | Na2BeSi4O10 · 4H2O |
9.EA.70 | Ajoite | (K,Na)Cu7AlSi9O24(OH)6 · 3H2O |
9.EA.75 | Zeravshanite | Na2Cs4Zr3[Si18O45]*2H2O |
9.EA.80 | Bussyite-(Ce) | (Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4 |
9.EA.85 | Plumbophyllite | Pb2Si4O10 · H2O |
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 Sazhinite-(La)
mindat.org URL:
https://www.mindat.org/min-27499.html
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References for Sazhinite-(La)
Localities for Sazhinite-(La)
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).
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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Canada | |
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Namibia (TL) | |
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Aris Quarries, Aris, Windhoek Rural, Khomas Region, Namibia