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Grattarolaite

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Castelnuovo Mine, Santa Barbara lignite District, Cavriglia, Valdarno (Val d'Arno), Arezzo Province, Tuscany, Italy
© Thomas Witzke

Formula:
Fe
3+
3
[O
 
3
|PO
 
4
]
System:TrigonalColour:reddish brown
Lustre:Greasy
Name:For Giuseppe Grattarola (1905-1988), Professor of Mineralogy at the University of Florence, Italy.
This page provides mineralogical data about Grattarolaite.

Classification of Grattarolaite

IMA status:Approved 1995
Strunz 8th edition ID:7/B.09-15
Nickel-Strunz 10th (pending) edition ID:8.BE.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
E : With only medium-sized cations, (OH, etc.):RO4 > 2:1
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Type Occurrence of Grattarolaite

Type Locality:Castelnuovo Mine, Santa Barbara lignite District, Cavriglia, Valdarno (Val d'Arno), Arezzo Province, Tuscany, Italy
Year of Discovery:1997

Physical Properties of Grattarolaite

Lustre:Greasy
Colour:reddish brown
Streak:brown
Cleavage:None Observed
Density (calculated):4.08 g/cm3

Crystallography of Grattarolaite

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 7.994Å, c = 6.855Å
Ratio:a:c = 1 : 0.858
Unit Cell Volume:V 379.37 ų (Calculated from Unit Cell)
Z:3

Chemical Properties of Grattarolaite

Formula:
Fe
3+
3
[O
 
3
|PO
 
4
]
Essential elements:Fe, O, P
All elements listed in formula:Fe, O, P

Relationship of Grattarolaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BE.05Augelite
Al
 
2
[(OH)
 
3
|PO
 
4
]
8.BE.15Cornetite
Cu
 
3
[(OH)
 
3
|PO
 
4
]
8.BE.20Clinoclase
Cu
 
3
[(OH)
 
3
|AsO
 
4
]
8.BE.25Arhbarite
Cu
 
2
Mg[(OH)
 
3
|AsO
 
4
]
8.BE.25Gilmarite
Cu
 
3
[(OH)
 
3
|AsO
 
4
]
8.BE.30Allactite
Mn
2+
7
(AsO
 
4
)
 
2
(OH)
 
8
8.BE.30Flinkite
Mn
2+
2
Mn
3+
 
AsO
 
4
(OH)
 
4
8.BE.30Raadeite
Mg
 
7
(PO
 
4
)
 
2
(OH)
 
8
8.BE.35Chlorophoenicite
(Mn,Mg)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
8.BE.35Magnesiochlorophoenicite
(Mg,Mn)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
8.BE.40Gerdtremmelite
(Zn,Fe)(Al,Fe)
 
2
AsO
 
4
(OH)
 
5
8.BE.45Dixenite
CuMn
2+
14
Fe
2+
 
[(OH)
 
6
|(AsO
 
3
)
 
5
|AsO
 
4
|(SiO
 
4
)
 
2
]
8.BE.45Hematolite
(Mn,Mg,Al)
 
15
(AsO
 
3
)(AsO
 
4
)
 
2
(OH)
 
23
8.BE.45Kraisslite
(Mn
2+
 
,Mg)
 
24
Zn
 
4
[(OH)
 
12
|(AsO
 
4
)
 
4
|(SiO
 
4
)
 
8
]
8.BE.45Mcgovernite
(Mn,Mg,Zn)
 
273
As
3+
~12
As
5+
~30
Si
 
~42
O
 
324
(OH)
 
252
8.BE.45Arakiite
(Zn,Mn
2+
 
)(Mn
2+
 
,Mg)
 
12
(Fe
3+
 
,Al)
 
2
(AsO
 
3
)(AsO
 
4
)
 
2
(OH)
 
23
8.BE.45Turtmannite
(Mn,Mg)
 
22.5
Mg
 
3-3x
[(V,As)O
 
4
]
 
3
[SiO
 
4
]
 
3
[AsO
 
3
]
 
x
O
 
5-5x
(OH)
 
20+x
8.BE.50Synadelphite
Mn
2+
9
[(OH)
 
9
|As
3+
 
O
 
3
|(As
5+
 
O
 
4
)
 
2
] · 2H
 
2
O
8.BE.55Holdenite
(Mn
2+
 
,Mg)
 
6
Zn
 
3
[(OH)
 
8
|(AsO
 
4
)
 
2
|SiO
 
4
]
8.BE.60Kolicite
Mn
2+
7
Zn
 
4
[(OH)
 
8
|(AsO
 
4
)
 
2
|(SiO
 
4
)
 
2
]
8.BE.65Sabelliite
(Cu,Zn)
 
2
Zn[(OH)
 
3
|(AsO
 
4
,SbO
 
4
)]
8.BE.70Jarosewichite
Mn
 
3
MnAsO
 
4
(OH)
 
6
8.BE.75Theisite
Cu
 
5
Zn
 
5
[(OH)
 
7
|(AsO
 
4
,SbO
 
4
)]
 
2
8.BE.80Coparsite
Cu
 
4
[O
 
2
|Cl|(AsO
 
4
,VO
 
4
)]
8.BE.85Waterhouseite
Mn
2+
7
[(OH)
 
8
|(PO
 
4
)
 
2
]

Other Names for Grattarolaite

Synonyms:
IMA1995-037
Other Languages:
German:Grattarolait
Russian:Граттаролит
Spanish:Grattarolaita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Grattarolaite

Reference List:Cipriani, C., M. Mellini, G. Pratesi & C. Viti (1997), Rodolicoite and grattarolaite, two new phosphate minerals from Santa Barbara Mine, Italy.: European Journal of Mineralogy: 9: 1101-1106.

Mineralogical Record: 29: 470-471.

Journal of Solid State Chemistry: 47: 245-255.

Internet Links for Grattarolaite

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    Localities for Grattarolaite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Tuscany
      • Arezzo Province
        • Valdarno (Val d'Arno)
          • Cavriglia
            • Santa Barbara lignite District
    		C. Cipriani et al. (1997) Eur. J. Mineral. 9, 1101-1106
    Mineral and/or Locality
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