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Dalyite from
Green Mountain, Ascension Island, Saint Helena， Ascension and Tristan da Cunha


Locality type:Mountain
Classification
Species:Dalyite
Formula:K2ZrSi6O15
Chemical Analyses:
Oxide wt%:
1
SiO261.85 %
ZrO221.70 %
K2O14.60 %
Na2O1.75 %
Fe2O30.37 %
H2O0.64 %
Total:100.91 %
Sample references:
1Type Specimen
Van Tassel, R., Hey, M. H. (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine and Journal of the Mineralogical Society, 29 (217) 850-857 doi:10.1180/minmag.1952.029.217.02
Comments:Accessory in ejected blocks of alkalic granite in trachytic and basaltic tuffs.
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Dalyite data
Locality Data:Click here to view Green Mountain, Ascension Island, Saint Helena， Ascension and Tristan da Cunha
Data Identifiers
Mindat Occurrence Record ID:4350
Long-form Identifier:1:3:4350:2
GUID (UUID V4):0
Nearest other occurrences of Dalyite
0.5km (0.3 miles) ⓘ5 mile post, Ascension Island, Saint Helena， Ascension and Tristan da Cunha
2.6km (1.6 miles) ⓘMiddleton Peak, Ascension Island, Saint Helena， Ascension and Tristan da Cunha
References
Van Tassel, R., Hey, M. H. (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine and Journal of the Mineralogical Society, 29 (217) 850-857 doi:10.1180/minmag.1952.029.217.02
Fleet, S. G. (1965) The crystal structure of dalyite. Zeitschrift für Kristallographie, 121 (5). 349-368 doi:10.1524/zkri.1965.121.5.349
 
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