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While externally similar shapes, these two minerals are very different inside.
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Smectite Group from
South Sulfur Bank, Kilauea Volcano, Hawaii County, Hawaii, USA


Locality type:Outcrop
Classification
Species:'Smectite Group' (not an IMA approved species)
Formula:A0.3D2-3[T4O10]Z2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Smectite Group data
Locality Data:Click here to view South Sulfur Bank, Kilauea Volcano, Hawaii County, Hawaii, USA
Data Identifiers
Mindat Occurrence Record ID:1630008
Long-form Identifier:1:3:1630008:0
GUID (UUID V4):0
Nearest other occurrences of Smectite Group
30.7km (19.1 miles) ⓘSOH-4 borehole, East Rift Zone, Kilauea Volcano, Hawaii County, Hawaii, USA
42.3km (26.3 miles) ⓘSOH-1 borehole, East Rift Zone, Kilauea Volcano, Hawaii County, Hawaii, USA
46.0km (28.6 miles) ⓘSOH-2 borehole, East Rift Zone, Kilauea Volcano, Hawaii County, Hawaii, USA
50.6km (31.5 miles) ⓘMauna Kea summit region, Hawaii County, Hawaii, USA
References
Bishop, Janice L., Schiffman, Peter, Murad, Enver, Southard, Randal J., Gruendler, Lukas, Dyar, M. Darby, Lane, Melissa D. (2024) Solfataric Alteration at the South Sulfur Bank, Kilauea, Hawaii, as a Mechanism for Formation of Sulfates, Phyllosilicates, and Silica on Mars. American Mineralogist. doi:10.2138/am-2023-9153
 
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