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Ferri-ghoseite from
Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA


Classification
Species:Ferri-ghoseite
Formula:◻(Mn2+Na)(Mg4Fe3+)Si8O22(OH)2
Comments:Reported by Dick Schooner as "Tirodite", reference below provides no details. An XRD analysis of a sample labeled "tirodite" from Dick Schooner's collection could not differentiate it from actinolite. However, Schooner (circa 1990) reports: "Tan or green tirodite, lamellar and bladed, was rather common at the Jail Hill quarry, usually with only spessartine or barite. Masses two inches across have been preserved. A few little silky-fibrous tufts proved to be tirodite, also. This material was studied at the University of Michigan." A dark green amphibole-rich Schooner specimen labeled as "tirodite" (photo 983892) was analysed via SEM-EDS by Micromounters New England in 2019 and was found to be ferro-actinolite (no Mn).
Habit:lamellar or bladed
Colour:tan or green
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ferri-ghoseite data
Locality Data:Click here to view Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:706186
Long-form Identifier:1:3:706186:8
GUID (UUID V4):0
References
Schooner, Richard. (circa 1990), Untitled manuscript on central Connecticut minerals.
Januzzi (1976) p. 229, 235
 
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