Locality type: | Quarry |
Classification |
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Species: | Heulandite-Na |
Formula: | (Na,Ca,K)6(Si,Al)36O72 · 22H2O |
Comments: | The measured Si:Al ratio ranges between ~3.5:1 and ~4:1 (analyses on crystal faces) and thus straddles, for the Si-richest compositions, the boundary between heulandite-Na and clinoptilolite-Na. |
Confirmation |
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Validity: | Believed Valid |
Data |
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Mineral Data: | Click here to view Heulandite-Na data |
Locality Data: | Click here to view Aris Quarries, Aris, Windhoek Rural, Khomas Region, Namibia |
Data Identifiers |
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Mindat Occurrence Record ID: | 776869 |
Long-form Identifier: | 1:3:776869:9 |
GUID (UUID V4): | dae34d21-ca68-46fc-ba66-5f85e0a0f005 |
References |
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Kolitsch, U., Blaß, G., Jahn, S., Cámara, F., von Bezing, L., Wartha, R. R., Tremmel, G., Sturla, M., Cerea, P., Skebo, M. and Ciriotti, M. E. (2016): Aris - mineralogy of the famous alkaline phonolite. AMI - Associazione Micromineralogica Italiana, Cremona, Italy, 95 pp. |
Aris Quarries, Aris, Windhoek Rural, Khomas Region, Namibia