Hydroterskite
A valid IMA mineral species
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About Hydroterskite
Formula:
Na2ZrSi6O12(OH)6
Colour:
Pale gray
Lustre:
Vitreous
Specific Gravity:
2.57 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for its chemical relationship to terskite and increased hydration.
Related to terskite. Chemically similar to kapustinite and litvinskite. Compare also 'UM1967-12-SiO:HNaZr'.
Unique Identifiers
Mindat ID:
46792
Long-form identifier:
mindat:1:1:46792:8
IMA Classification of Hydroterskite
Classification of Hydroterskite
9.DM.40
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
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 for Standard |
|---|---|---|
| Hter | 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 Hydroterskite
Vitreous
Transparency:
Translucent
Colour:
Pale gray
Streak:
White
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good cleavages on the prismatic planes
Good cleavages on the prismatic planes
Fracture:
Splintery
Density:
2.57 g/cm3 (Calculated)
Optical Data of Hydroterskite
Type:
Biaxial (-)
RI values:
nα = 1.560 - 1.564 nβ = 1.565 - 1.569 nγ = 1.569 - 1.573
2V:
Measured: 86° (3), Calculated: 83°
Max. Birefringence:
δ = 0.009
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
Could not be observed
Pleochroism:
Non-pleochroic
Chemistry of Hydroterskite
Mindat Formula:
Na2ZrSi6O12(OH)6
Element Weights:
Crystallography of Hydroterskite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 13.956(6) Å, b = 14.894(5) Å, c = 7.441(4) Å
Ratio:
a:b:c = 0.937 : 1 : 0.5
Unit Cell V:
1,546.69 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Short prismatic. Forms observed: Prisms {100}, {010}, and {001}.
Comment:
Pnca
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.123 Å | (55) |
| 3.716 Å | (53) |
| 3.482 Å | (51) |
| 3.322 Å | (100) |
| 3.283 Å | (80) |
| 3.158 Å | (54) |
| 2.544 Å | (57) |
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 Hydroterskite
General Appearance of Type Material:
Short prismatic in habit, up to 3 mm in width, and bounded by the {100}, {010}, and {001} prisms.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, Ontario K1P 6P4, catalogue number CMNMC 86896.
Geological Setting of Type Material:
In miarolitic cavities in a nepheline syenite sill.
Associated Minerals at Type Locality:
Synonyms of Hydroterskite
Other Language Names for Hydroterskite
Dutch:Hydroterskiet
German:Hydroterskit
Common Associates
Associations Based on Photo Data:
| 25 photos of Hydroterskite associated with Terskite | Na4ZrSi6O16 · 2H2O |
| 16 photos of Hydroterskite associated with Microcline | K(AlSi3O8) |
| 14 photos of Hydroterskite associated with Aegirine | NaFe3+Si2O6 |
| 13 photos of Hydroterskite associated with Raite | Mn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6 |
| 12 photos of Hydroterskite associated with Lovozerite Group | A3D3G2M(HxSi6O18) · nH2O (x = 0-6) |
| 11 photos of Hydroterskite associated with Zakharovite | Na4Mn5Si10O24(OH)6 · 6H2O |
| 10 photos of Hydroterskite associated with Calcite | CaCO3 |
| 8 photos of Hydroterskite associated with Sodalite | Na4(Si3Al3)O12Cl |
| 6 photos of Hydroterskite associated with Phillipsite-K | K6(Si10Al6)O32 · 12H2O |
| 6 photos of Hydroterskite associated with Clinoptilolite-Ca | Ca3(Si30Al6)O72 · 20H2O |
Related Minerals - Strunz-mindat Grouping
| 9.DM. | Kesebolite-(Ce) | CeCa2Mn(AsO4)(SiO3)3 |
| 9.DM.05 | Stokesite | CaSn[Si3O9] · 2H2O |
| 9.DM.10 | Calciohilairite | CaZr[SiO3]3 · 3H2O |
| 9.DM.10 | Pyatenkoite-(Y) | Na5YTi[SiO3]6 · 6H2O |
| 9.DM.10 | Hilairite | Na2Zr[SiO3]3 · 3H2O |
| 9.DM.10 | Komkovite | BaZr[Si3O9] · 3H2O |
| 9.DM.10 | Sazykinaite-(Y) | Na5YZr[SiO3]6 · 6H2O |
| 9.DM.15 | Plumbogaidonnayite | PbZrSi3O9 · 2H2O |
| 9.DM.15 | Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
| 9.DM.15 | Georgechaoite | NaKZr[Si3O9] · 2H2O |
| 9.DM.20 | Chkalovite | Na2BeSi2O6 |
| 9.DM.25 | Vlasovite | Na2ZrSi4O11 |
| 9.DM.30 | Revdite | Na16Si16O27(OH)26 · 28H2O |
| 9.DM.35 | Scheuchzerite | Na(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3 |
| 9.DM.40 | Terskite | Na4ZrSi6O16 · 2H2O |
Fluorescence of Hydroterskite
None
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 Hydroterskite
mindat.org URL:
https://www.mindat.org/min-46792.html
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Please feel free to link to this page.
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References for Hydroterskite
Localities for Hydroterskite
Showing 2 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Grice et al. (2015) |
| Grice et al. (2015) |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada