Ertixiite
A valid IMA mineral species
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Formula:
Na2Si4O9
Colour:
White, colorless
Lustre:
Vitreous
Hardness:
5½ - 6½
Specific Gravity:
2.35
Crystal System:
Isometric
Name:
For the river Irtysh (in Xinjiang Ertix; in standard Chinese phonetics E'erqisi) which passes through the valley below the type locality.
This page provides mineralogical data about Ertixiite.
Unique Identifiers
Mindat ID:
1406
Long-form identifier:
mindat:1:1:1406:5
GUID
(UUID V4):
(UUID V4):
a6e25c96-ed47-46db-8e66-17492f42374c
IMA Classification of Ertixiite
Approved
First published:
1985
Classification of Ertixiite
9.HA.05
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
78.7.3.1
78 : Unclassified Silicates
7 :
78 : Unclassified Silicates
7 :
14.1.2
14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals
14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals
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 |
---|---|---|
Ert | 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 Ertixiite
Vitreous
Transparency:
Transparent
Colour:
White, colorless
Streak:
White
Hardness:
5½ - 6½ on Mohs scale
Cleavage:
None Observed
Fracture:
Sub-Conchoidal
Density:
2.35 g/cm3 (Measured) 2.34 g/cm3 (Calculated)
Optical Data of Ertixiite
Type:
Isotropic
RI values:
n = 1.502(1)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Low
Pleochroism:
Non-pleochroic
Chemistry of Ertixiite
Mindat Formula:
Na2Si4O9
Elements listed:
Common Impurities:
Al,Fe,Ca
Crystallography of Ertixiite
Crystal System:
Isometric
Cell Parameters:
a = 5.975 Å
Unit Cell V:
213.31 ų (Calculated from Unit Cell)
Z:
1
Comment:
Point Group: n.d.; Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.443 Å | (20) |
2.988 Å | (20) |
2.674 Å | (20) |
1.996 Å | (80) |
1.798 Å | (100) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites |
Type Occurrence of Ertixiite
General Appearance of Type Material:
granular in small miarolitic cavities
Place of Conservation of Type Material:
Geological Museum of the Chengdu Geological College
Geological Setting of Type Material:
A Ta-Nb-Be-pegmatite
Associated Minerals at Type Locality:
Reference:
Zhang, R., Han, F., Du, C. (1985) Ertixiite - A new mineral from the Altay Pegmatite mine, Xinjiang, China. Geochemistry: 4: 192-195.
Synonyms of Ertixiite
Other Language Names for Ertixiite
Related Minerals - Strunz-mindat Grouping
9.HA. | Qeltite | Ca3TiSi2(Fe3+2Si)O14 |
9.HA. | Kalyuzhnyite-(Ce) | NaKCaSrCeTi(Si8O21)OF(H2O)3 |
9.HA. | Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
9.HA. | Moragite | Ca3TiSi2(Al2Si)O14 |
9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O |
9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 |
9.HA.25 | Magbasite | KBaFe3+Mg7Si8O22(OH)2F6 |
9.HA.35 | Demagistrisite | BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4 · 3H2O |
9.HA.37 | Donwilhelmsite | CaAl4Si2O11 |
9.HA.40 | Igumnovite | Ca3Al2[SiO4]2[◻Cl4] |
9.HA.40 | Kasatkinite | Ba2Ca8B5Si8O32(OH)3 · 6H2O |
9.HA.42 | Paqueite | Ca3TiSi2(Al,Ti,Si)3O14 |
9.HA.45 | Rippite | K2(Nb,Ti)2(Si4O12)O(O,F) |
9.HA.47 | Zagamiite | CaAl2Si3.5O11 |
9.HA.50 | α-Carnegieite | NaAlSiO4 |
9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O |
9.HA.52 | Atheriastite | near Ca5MgFeAl6Si8O32 · 5H2O |
9.HA.55 | Balvraidite | |
9.HA.55 | Foshallasite | Ca3[Si2O7] · 3H2O(?) |
9.HA.57 | Bhreckite | Ca, Mg, Fe, Si, O, H |
9.HA.60 | Bravaisite | |
9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 |
9.HA.65 | Caryochroite | (Na,Sr)3(Fe3+,Mg)10[Ti2Si12O37] · (H2O,O,OH)17 |
9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near |
9.HA.75 | Tacharanite | Ca12Al2Si18O33 (OH)36 |
9.HA.80 | Oyelite | Ca10Si8B2O29 · 12.5H2O |
9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x) · 2H2O |
9.HA.90 | Tiettaite | K4Na12Fe3+Si16O41(OH)4 · 2H2O |
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 Ertixiite
mindat.org URL:
https://www.mindat.org/min-1406.html
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References for Ertixiite
Reference List:
Localities for Ertixiite
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.
China (TL) | |
| Zhang Rubo et al. (1985) |
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