Experimental determination of the upper stability of scorzalite, FeAl2[OH/PO4]2, and the occurrence of minerals with a composition intermediate between scorzalite and lazulite(ss) up to the conditions of the amphibolite facies

P. Schmid-Beurmann; G. Morteani; L. Cemič

doi:10.1007/bf01172485

Experimental determination of the upper stability of scorzalite, FeAl₂[OH/PO₄]₂, and the occurrence of minerals with a composition intermediate between scorzalite and lazulite(ss) up to the conditions of the amphibolite facies

P. Schmid-Beurmann
, G. Morteani
, L. Cemič

Default

Christian-Albrechts-Universitat zu Kiel

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The stability field of scorzalite (FeAl₂[OH/PO₄]₂) was investigated in the P-T range from 487 to 684°C and 0.1 to 0.3 GPa in hydrothermal experiments. The oxygen fugacity was fixed by the Ni/NiO buffer. Scorzalite shows a decomposition according to the reaction: FeAl₂[OH/PO₄]₂) ⇔ FeAlPO₅+AlPO₄ (berlinite) + H₂O. The mean standard enthalpy and standard entropy of reaction were determined as ΔH⁰_R = 94(13) kJ, ΔS⁰_R = 180(16) JK^-1. A ⁵⁷Fe-Mößbauer spectroscopic examination showed that about 4 atomic % of the total Fe in scorzalite is trivalent.

Original language	English
Pages (from-to)	211-222
Number of pages	12
Journal	Mineralogy and Petrology
Volume	61
Issue number	1-4
DOIs	https://doi.org/10.1007/bf01172485
State	Published - 1998

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@article{aa141c37d3f04b3e9b677ac914ded48d,

title = "Experimental determination of the upper stability of scorzalite, FeAl2[OH/PO4]2, and the occurrence of minerals with a composition intermediate between scorzalite and lazulite(ss) up to the conditions of the amphibolite facies",

abstract = "The stability field of scorzalite (FeAl2[OH/PO4]2) was investigated in the P-T range from 487 to 684°C and 0.1 to 0.3 GPa in hydrothermal experiments. The oxygen fugacity was fixed by the Ni/NiO buffer. Scorzalite shows a decomposition according to the reaction: FeAl2[OH/PO4]2) ⇔ FeAlPO5+AlPO4 (berlinite) + H2O. The mean standard enthalpy and standard entropy of reaction were determined as ΔH0R = 94(13) kJ, ΔS0R = 180(16) JK-1. A 57Fe-M{\"o}{\ss}bauer spectroscopic examination showed that about 4 atomic \% of the total Fe in scorzalite is trivalent.",

author = "P. Schmid-Beurmann and G. Morteani and L. Cemi{\v c}",

year = "1998",

doi = "10.1007/bf01172485",

language = "English",

volume = "61",

pages = "211--222",

journal = "Mineralogy and Petrology",

issn = "0930-0708",

publisher = "Springer-Verlag Wien",

number = "1-4",

}

Schmid-Beurmann, P, Morteani, G & Cemič, L 1998, 'Experimental determination of the upper stability of scorzalite, FeAl₂[OH/PO₄]₂, and the occurrence of minerals with a composition intermediate between scorzalite and lazulite(ss) up to the conditions of the amphibolite facies', Mineralogy and Petrology, vol. 61, no. 1-4, pp. 211-222. https://doi.org/10.1007/bf01172485

Experimental determination of the upper stability of scorzalite, FeAl₂[OH/PO₄]₂, and the occurrence of minerals with a composition intermediate between scorzalite and lazulite(ss) up to the conditions of the amphibolite facies. / Schmid-Beurmann, P.; Morteani, G.; Cemič, L.
In: Mineralogy and Petrology, Vol. 61, No. 1-4, 1998, p. 211-222.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Experimental determination of the upper stability of scorzalite, FeAl2[OH/PO4]2, and the occurrence of minerals with a composition intermediate between scorzalite and lazulite(ss) up to the conditions of the amphibolite facies

AU - Schmid-Beurmann, P.

AU - Morteani, G.

AU - Cemič, L.

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N2 - The stability field of scorzalite (FeAl2[OH/PO4]2) was investigated in the P-T range from 487 to 684°C and 0.1 to 0.3 GPa in hydrothermal experiments. The oxygen fugacity was fixed by the Ni/NiO buffer. Scorzalite shows a decomposition according to the reaction: FeAl2[OH/PO4]2) ⇔ FeAlPO5+AlPO4 (berlinite) + H2O. The mean standard enthalpy and standard entropy of reaction were determined as ΔH0R = 94(13) kJ, ΔS0R = 180(16) JK-1. A 57Fe-Mößbauer spectroscopic examination showed that about 4 atomic % of the total Fe in scorzalite is trivalent.

AB - The stability field of scorzalite (FeAl2[OH/PO4]2) was investigated in the P-T range from 487 to 684°C and 0.1 to 0.3 GPa in hydrothermal experiments. The oxygen fugacity was fixed by the Ni/NiO buffer. Scorzalite shows a decomposition according to the reaction: FeAl2[OH/PO4]2) ⇔ FeAlPO5+AlPO4 (berlinite) + H2O. The mean standard enthalpy and standard entropy of reaction were determined as ΔH0R = 94(13) kJ, ΔS0R = 180(16) JK-1. A 57Fe-Mößbauer spectroscopic examination showed that about 4 atomic % of the total Fe in scorzalite is trivalent.

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