Pharmacosiderite R050574

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Record 3 of 4  

Name: Pharmacosiderite
RRUFF ID: R050574
Ideal Chemistry: KFe3+4(AsO4)3(OH)4·6-7H2O
Locality: Cornwall, England
Source: University of Arizona Mineral Museum 5028 [view label]
Owner: RRUFF
Description: Druse of bluish-green cubes
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ pharmacosiderite (4) ]
Quick search: [ All Pharmacosiderite samples (2) ]
RRUFF ID: R050574.2
Sample Description: Microprobe Fragment
Measured Chemistry: K1.27(Fe3+3.73Fe2+0.27)Σ=4(As1.00O4)3(OH)4·6H2O
Microprobe Data File: [ Download Excel File ]
Sample Description: Sample is oriented and mounted on a pin.
Pin ID: M00886
Orientation: Laser parallel to  c*  (0 0 1).     Fiducial mark perpendicular to laser is parallel to  -a   [-1 0 0].

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Direction of polarization of laser relative to fiducial mark:
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RRUFF ID: R050574
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
REFERENCES for Pharmacosiderite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Hausmann J F L (1813) Pharmakosiderit, in Handbuch der Mineralogie, Volume 3 Göttingen 1065-1067   [view file]

Zemann J (1948) Formel und strukturtyp des pharmakosiderits, Tschermaks Mineralogische und Petrographische Mitteilungen, 1, 1-13

Buerger M J, Dollase W A, Garaycochea-Wittke I (1967) The structure and composition of the mineral pharmacosiderite, Zeitschrift für Kristallographie, 125, 92-108   [view file]

Mills S J, Hager S L, Leverett P, Williams P A, Raudsepp M (2010) The structure of H3O+ - exchanged pharmacosiderite, Mineralogical Magazine, 74, 487-492   [view file]

Rumsey M S, Mills S J, Spratt J (2010) Natropharmacoalumite, NaAl4[(OH)4(AsO4)3]·4H2O, a new mineral of the pharmacosiderite supergroup and the renaming of aluminopharmacosiderite to pharmacoalumite, Mineralogical Magazine, 74, 929-936   [view file]

Majzlan J, Haase P, Plášil J, Dachs E (2019) Synthesis and stability of some members of the pharmacosiderite group, AFe4(OH)4(AsO4)3·nH2O (A = K, Na, 0.5Ba, 0.5Sr), The Canadian Mineralogist, 57, 663-675