Large Tolbachik Fissure Eruption, S.A. Fedotov, Moscow 1984 p340, states that Cristobalite does not occur as independent mineral, but as inclusions in high temp sublimates. After dissolving the sublimates, Cristobalite was found in the residu.

Mineral Occurrences

See Also

These are possibly similar items as determined by title/reference text matching only.

	Fedotov, S.A. (ed.) (1984) The Great Fissure Tolbachik Eruption. Moscow, Nauka.
	Fedotov S.A., Markhinin Ye.K. (1983) The Great Tolbachik Fissure Eruption: Geological and Geophysical Data, 1975-1976. Cambridge University Press, 341 pages. ISBN 0-521-24345-9.
	found in volcanic fumaroles of the 2012–2013 Tolbachik fissure eruption, Kamchatka peninsula, on the new cinder Naboko cone
	In that magazine, it is said that the mineral was found outside the mine and should then be listed as Cligga Head.
	It was later recognised that the mineral is not ardennite, but a new mineral:
	Fedotov, S. A., Markhinin, Ye. K. (1978) The Great Tolbachik Fissure Eruption - Geological and Geophysical Data 1975-1976. Cambridge University Press, Cambridge.
	Fedotov, S. A., Gorelchik, V. I., Stepanov, V. V. (1980) Seismological studies on the mechanism of the large Tolbachik fissure eruption, 1975–1976. Bulletin Volcanologique, 43 (1). 73-84 doi:10.1007/bf02597612
	Fedotov, S. A., Chirkov, A. M., Gusev, N. A., Kovalev, G. N., Slezin, Yu. B. (1980) The large fissure eruption in the region of Plosky Tolbachik volcano in Kamchatka, 1975–1976. Bulletin Volcanologique, 43 (1). 47-60 doi:10.1007/bf02597610
	SWANSON, D. A. (1984) A Voluminous Eruption: The Great Tolbachik Fissure Eruption. Science, 223 (4632). 160 doi:10.1126/science.223.4632.160
	Serafimova, E.K., Semenova, T.F., Vergasova, L.P., Filatov, S.K., Epifanova, V.B., Anan’yev, V.V. (1996) New data on malladrite Na2SiF6, a mineral of volcanic exhalations from the Large Tolbachik Fissure Eruption. Volcanol. Seismol.: 1: 46–55. (in Russian)
	Barth, T.F.W. (1932) The cristobalite structures: I. High cristobalite. American Journal of Science: 23: 350-356.