A new hydrous phase δ-Al00H synthesized at 21 GPa and 1000 °C

A. Suzuki; Eiji Otani; T. Kamada

doi:10.1007/s002690000120

A new hydrous phase δ-Al00H synthesized at 21 GPa and 1000 °C

A. Suzuki, Eiji Otani, T. Kamada

SCI - Earth Science

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

92 Citations (Scopus)

Abstract

A new phase of AlOOH (tentatively called δ-AlOOH) was synthesized at 21 GPa and 1000°C and its crystal structure was identified by a powder X-ray diffraction method. Rietveld refinement revealed that this aluminum oxide hydroxide has an orthorhombic unit cell, a = 4.7134(1) Å, b = 4.2241(1) Å, c = 2.83252(8) Å, V = 56.395 (5) Å³, and Z = 2 in the space group of P2₁ nm. A calculated density is 3.533 g cm^-3, which is about 4.48 and 15.04% denser than that of diaspore and boehmite, respectively. The δ-[Al_0.86Mg_0.07Si_0.07]OOH is also stable at 21 GPa and 1000°C, coexisting with majorite and phase egg, and its cell parameters are a = 4.710(1) Å, b = 4.215(1) Å, c = 2.839(1) Å, and V = 56.37(1) Å³.

Original language	English
Pages (from-to)	689-693
Number of pages	5
Journal	Physics and Chemistry of Minerals
Volume	27
Issue number	10
DOIs	https://doi.org/10.1007/s002690000120
Publication status	Published - 2000

Keywords

Aluminum oxide hydroxide
High-pressure
Hydrous mineral
Transition zone

ASJC Scopus subject areas

Materials Science(all)
Geochemistry and Petrology

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10.1007/s002690000120

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title = "A new hydrous phase δ-Al00H synthesized at 21 GPa and 1000 °C",

abstract = "A new phase of AlOOH (tentatively called δ-AlOOH) was synthesized at 21 GPa and 1000°C and its crystal structure was identified by a powder X-ray diffraction method. Rietveld refinement revealed that this aluminum oxide hydroxide has an orthorhombic unit cell, a = 4.7134(1) {\AA}, b = 4.2241(1) {\AA}, c = 2.83252(8) {\AA}, V = 56.395 (5) {\AA}3, and Z = 2 in the space group of P21 nm. A calculated density is 3.533 g cm-3, which is about 4.48 and 15.04% denser than that of diaspore and boehmite, respectively. The δ-[Al0.86Mg0.07Si0.07]OOH is also stable at 21 GPa and 1000°C, coexisting with majorite and phase egg, and its cell parameters are a = 4.710(1) {\AA}, b = 4.215(1) {\AA}, c = 2.839(1) {\AA}, and V = 56.37(1) {\AA}3.",

keywords = "Aluminum oxide hydroxide, High-pressure, Hydrous mineral, Transition zone",

author = "A. Suzuki and Eiji Otani and T. Kamada",

year = "2000",

doi = "10.1007/s002690000120",

language = "English",

volume = "27",

pages = "689--693",

journal = "Physics and Chemistry of Minerals",

issn = "0342-1791",

publisher = "Springer Verlag",

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TY - JOUR

T1 - A new hydrous phase δ-Al00H synthesized at 21 GPa and 1000 °C

AU - Suzuki, A.

AU - Otani, Eiji

AU - Kamada, T.

PY - 2000

Y1 - 2000

N2 - A new phase of AlOOH (tentatively called δ-AlOOH) was synthesized at 21 GPa and 1000°C and its crystal structure was identified by a powder X-ray diffraction method. Rietveld refinement revealed that this aluminum oxide hydroxide has an orthorhombic unit cell, a = 4.7134(1) Å, b = 4.2241(1) Å, c = 2.83252(8) Å, V = 56.395 (5) Å3, and Z = 2 in the space group of P21 nm. A calculated density is 3.533 g cm-3, which is about 4.48 and 15.04% denser than that of diaspore and boehmite, respectively. The δ-[Al0.86Mg0.07Si0.07]OOH is also stable at 21 GPa and 1000°C, coexisting with majorite and phase egg, and its cell parameters are a = 4.710(1) Å, b = 4.215(1) Å, c = 2.839(1) Å, and V = 56.37(1) Å3.

AB - A new phase of AlOOH (tentatively called δ-AlOOH) was synthesized at 21 GPa and 1000°C and its crystal structure was identified by a powder X-ray diffraction method. Rietveld refinement revealed that this aluminum oxide hydroxide has an orthorhombic unit cell, a = 4.7134(1) Å, b = 4.2241(1) Å, c = 2.83252(8) Å, V = 56.395 (5) Å3, and Z = 2 in the space group of P21 nm. A calculated density is 3.533 g cm-3, which is about 4.48 and 15.04% denser than that of diaspore and boehmite, respectively. The δ-[Al0.86Mg0.07Si0.07]OOH is also stable at 21 GPa and 1000°C, coexisting with majorite and phase egg, and its cell parameters are a = 4.710(1) Å, b = 4.215(1) Å, c = 2.839(1) Å, and V = 56.37(1) Å3.

KW - Aluminum oxide hydroxide

KW - High-pressure

KW - Hydrous mineral

KW - Transition zone

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DO - 10.1007/s002690000120

M3 - Article

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SN - 0342-1791

VL - 27

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EP - 693

JO - Physics and Chemistry of Minerals

JF - Physics and Chemistry of Minerals

IS - 10

ER -

A new hydrous phase δ-Al00H synthesized at 21 GPa and 1000 °C

Abstract

Keywords

ASJC Scopus subject areas

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