frankhawthorneite

{{Short description|Monoclinic copper tellurate mineral}}

{{Infobox mineral

| name = Frankhawthorneite

| category = Tellurate mineral

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| formula = Cu₂Te⁶⁺O₄(OH)₂

| IMAsymbol = Fht{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}

| molweight =

| strunz = 4.FD.25

| dana = 33.1.4.1

| system = Monoclinic

| class = Prismatic (2/m)
(same H-M symbol)

| symmetry = P2₁/n

| color = Medium leaf-green

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| fracture = Uneven

| tenacity = Brittle

| mohs = 3–4

| luster = Vitreous

| refractive = 2.00

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| streak = Pale leaf-green

| gravity = 5.43

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| diaphaneity = Transparent

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| references = {{cite web |last1=Anthony |first1=John W. |last2=Bideaux |first2=Richard A. |last3=Bladh |first3=Kenneth W. |last4=Nichols |first4=Monte C. |title=Frankhawthorneite |url=http://www.handbookofmineralogy.org/pdfs/frankhawthorneite.pdf |website=Handbook of Mineralogy |publisher=Mineral Data Publishing |access-date=14 March 2022 |date=2005}}{{mindat|id=6958.html|title=Hawthorneite}}}}

Frankhawthorneite Cu₂Te⁶⁺O₄(OH)₂ is a monoclinic copper tellurate mineral (space group P2₁/n) named after Prof. Frank Christopher Hawthorne (born 1946), University of Manitoba, Winnipeg, Canada. It was discovered at Centennial Eureka Mine, Tintic District, East Tintic Mountains, Juab County, Utah, in 1995. It has a leaf green color.{{cite journal |last1=Grice |first1=J.D. |last2=Roberts |first2=A.C. |journal=The Canadian Mineralogist |volume=33 |year=1995 |pages=649–653 |title=Frankhawthorneite, a unique HCP framework structure of a cupric tellurate |url=https://www.researchgate.net/publication/304749883 |access-date=30 December 2020}}