Compounds and solid solutions of cobalt, copper phosphates

Carlos E. Bamberger; Eliot D. Specht; Lawrence M. Anovitz

doi:10.1111/j.1151-2916.1998.tb02699.x

Compounds and solid solutions of cobalt, copper phosphates

Carlos E. Bamberger
, Eliot D. Specht
, Lawrence M. Anovitz

Geochemistry & Interfacial Science

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

7 Scopus citations

Abstract

Cobalt phosphates have been synthesized and their thermal behavior examined. The formation of compounds and solid solutions among cobalt and copper phosphates is studied by X-ray diffraction. Unlimited solubility exists between the pyrophosphates Co₂P₂O₇ and Cu₂P₂O₇, the orthophosphates Co₃(PO₄)₂ and Cu₃(PO₄)₂, and Co₃(PO₄)₂ and Cu₂P₂O₇. X-ray diffraction indicates that the structures of cobalt and copper pyrophosphate solid solutions vary gradually from one end member to the other. The structures of orthophosphate solid solutions vary in a more complex manner: the change is gradual from Co₃(PO₄)₂ to Co₂Cu(PO₄)₂. At Co_1.5Cu_1.5(PO₄)₂, a new structure (L) occurs. At 950°C, CoCu₂(PO₄)₂ also exhibits this structure, which is similar to that of graftonite, Fe₃(PO₄)₂. CoCu₂(PO₄)₂ is dimorphic, changing reversibly at 1000°C to a triclinic structure (H) related to that of Cu₃(PO₄)₂. From CoCu₂(PO₄)₂ (H) to Cu₃(PO₄)₂, the structure appears to vary gradually. A new phosphate, Cu⁺Cu²⁺Co₃(PO₄)₃, has also been synthesized.

Original language	English
Pages (from-to)	2799-2804
Number of pages	6
Journal	Journal of the American Ceramic Society
Volume	81
Issue number	11
DOIs	https://doi.org/10.1111/j.1151-2916.1998.tb02699.x
State	Published - Nov 1998

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@article{09f8d8ba5c374131bc4cc42916c87579,

title = "Compounds and solid solutions of cobalt, copper phosphates",

abstract = "Cobalt phosphates have been synthesized and their thermal behavior examined. The formation of compounds and solid solutions among cobalt and copper phosphates is studied by X-ray diffraction. Unlimited solubility exists between the pyrophosphates Co2P2O7 and Cu2P2O7, the orthophosphates Co3(PO4)2 and Cu3(PO4)2, and Co3(PO4)2 and Cu2P2O7. X-ray diffraction indicates that the structures of cobalt and copper pyrophosphate solid solutions vary gradually from one end member to the other. The structures of orthophosphate solid solutions vary in a more complex manner: the change is gradual from Co3(PO4)2 to Co2Cu(PO4)2. At Co1.5Cu1.5(PO4)2, a new structure (L) occurs. At 950°C, CoCu2(PO4)2 also exhibits this structure, which is similar to that of graftonite, Fe3(PO4)2. CoCu2(PO4)2 is dimorphic, changing reversibly at 1000°C to a triclinic structure (H) related to that of Cu3(PO4)2. From CoCu2(PO4)2 (H) to Cu3(PO4)2, the structure appears to vary gradually. A new phosphate, Cu+Cu2+Co3(PO4)3, has also been synthesized.",

author = "Bamberger, \{Carlos E.\} and Specht, \{Eliot D.\} and Anovitz, \{Lawrence M.\}",

year = "1998",

month = nov,

doi = "10.1111/j.1151-2916.1998.tb02699.x",

language = "English",

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journal = "Journal of the American Ceramic Society",

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T1 - Compounds and solid solutions of cobalt, copper phosphates

AU - Bamberger, Carlos E.

AU - Specht, Eliot D.

AU - Anovitz, Lawrence M.

PY - 1998/11

Y1 - 1998/11

N2 - Cobalt phosphates have been synthesized and their thermal behavior examined. The formation of compounds and solid solutions among cobalt and copper phosphates is studied by X-ray diffraction. Unlimited solubility exists between the pyrophosphates Co2P2O7 and Cu2P2O7, the orthophosphates Co3(PO4)2 and Cu3(PO4)2, and Co3(PO4)2 and Cu2P2O7. X-ray diffraction indicates that the structures of cobalt and copper pyrophosphate solid solutions vary gradually from one end member to the other. The structures of orthophosphate solid solutions vary in a more complex manner: the change is gradual from Co3(PO4)2 to Co2Cu(PO4)2. At Co1.5Cu1.5(PO4)2, a new structure (L) occurs. At 950°C, CoCu2(PO4)2 also exhibits this structure, which is similar to that of graftonite, Fe3(PO4)2. CoCu2(PO4)2 is dimorphic, changing reversibly at 1000°C to a triclinic structure (H) related to that of Cu3(PO4)2. From CoCu2(PO4)2 (H) to Cu3(PO4)2, the structure appears to vary gradually. A new phosphate, Cu+Cu2+Co3(PO4)3, has also been synthesized.

AB - Cobalt phosphates have been synthesized and their thermal behavior examined. The formation of compounds and solid solutions among cobalt and copper phosphates is studied by X-ray diffraction. Unlimited solubility exists between the pyrophosphates Co2P2O7 and Cu2P2O7, the orthophosphates Co3(PO4)2 and Cu3(PO4)2, and Co3(PO4)2 and Cu2P2O7. X-ray diffraction indicates that the structures of cobalt and copper pyrophosphate solid solutions vary gradually from one end member to the other. The structures of orthophosphate solid solutions vary in a more complex manner: the change is gradual from Co3(PO4)2 to Co2Cu(PO4)2. At Co1.5Cu1.5(PO4)2, a new structure (L) occurs. At 950°C, CoCu2(PO4)2 also exhibits this structure, which is similar to that of graftonite, Fe3(PO4)2. CoCu2(PO4)2 is dimorphic, changing reversibly at 1000°C to a triclinic structure (H) related to that of Cu3(PO4)2. From CoCu2(PO4)2 (H) to Cu3(PO4)2, the structure appears to vary gradually. A new phosphate, Cu+Cu2+Co3(PO4)3, has also been synthesized.

UR - https://www.scopus.com/pages/publications/0032208135

U2 - 10.1111/j.1151-2916.1998.tb02699.x

DO - 10.1111/j.1151-2916.1998.tb02699.x

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SN - 0002-7820

VL - 81

SP - 2799

EP - 2804

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 11

ER -

Compounds and solid solutions of cobalt, copper phosphates

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