| | Description | |
| Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | GRAMACCIOLI, C.M., CAMPOSTRINI, I. (2007): Demartinite, a new natural polymorph of K2SiF6 from La Fossa crater, Vulcano, Aeolian Islands, Italy. - Canadian Mineralogist - 45, 1275-1280. | | Data | |
| Mineral Data: | Click here to view Avogadrite data | | Locality Data: | Click here to view La Fossa Crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy |
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