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Hydroterskite

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Related to terskite. Chemically similar to kapustinite and litvinskite. Compare also 'UM1967-12-SiO:HNaZr'.


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Classification of HydroterskiteHide

Approved
Approval Year:
2015
First Published:
2015

Physical Properties of HydroterskiteHide

Vitreous
Transparency:
Translucent
Colour:
Pale gray
Streak:
White
Tenacity:
Brittle
Cleavage:
Distinct/Good
good cleavages on the prismatic planes
Fracture:
Splintery

Optical Data of HydroterskiteHide

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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
Could not be observed
Pleochroism:
Non-pleochroic

Chemical Properties of HydroterskiteHide

Formula:
Na2ZrSi6O12(OH)6

Crystallography of HydroterskiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.123(55)
3.716(53)
3.482(51)
3.322(100)
3.283(80)
3.158(54)
2.544(57)
Comments:
From Type Description.

Type Occurrence of HydroterskiteHide

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.

Synonyms of HydroterskiteHide

Fluorescence of HydroterskiteHide

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 HydroterskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Grice, J.D., Rowe, R. & Poirier, G. (2015): Hydroterskite: a new mineral from the Sainte-Amable sill, Quebec, and a comparison with terskite and elpidite. Canadian Mineralogist 53, 821-832.

Internet Links for HydroterskiteHide

Localities for HydroterskiteHide

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
Grice, J.D., Rowe, R. & Poirier, G. (2015): Hydroterskite: a new mineral from the Sainte-Amable sill, Quebec, and a comparison with terskite and elpidite. Canadian Mineralogist 53, 821-832.
      • Lajemmerais RCM
        • Varennes & St-Amable
Grice, J.D., Rowe, R. and Poirier, G.(2015) Hydroterskite, IMA2015-042. CNMNC Newsletter No. 27, October 2015, page 1224; Mineralogical Magazine, 79, 1229-1236.
Grice, J.D., Rowe, R. & Poirier, G. (2015): Hydroterskite: a new mineral from the Sainte-Amable sill, Quebec, and a comparison with terskite and elpidite. Canadian Mineralogist 53, 821-832.
Mineral and/or Locality  
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