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Gramaccioliite-(Y)

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Sambuco, Stura Valley, Cuneo Province, Piedmont, Italy
© R. Bracco

Show Gramaccioliite-(Y) Photos (3)
Formula:
(Pb,Sr)(Y,Mn)(Ti,Fe
3+
 
)
 
18
Fe
3+
2
O
 
38
System:TrigonalColour:black
Hardness:6
Name:Honouring Carlo Maria Gramaccioli (b. 1935), mineral collector and Professor of Physical Chemistry, University of Milan, Italy.


The yttrium analogue of Senaite and the lead analogue of Dessauite.

Classification of Gramaccioliite-(Y)

IMA status:Approved 2001
Strunz 8th edition ID:4/C.09-62
Nickel-Strunz 10th (pending) edition ID:4.CC.40

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
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Type Occurrence of Gramaccioliite-(Y)

Type Locality:Sambuco, Stura Valley, Cuneo Province, Piedmont, Italy
General Appearance of Type Material:six-sided tabular crystals to 8 mm across
Year of Discovery:1976
Geological Setting of type material:mineralized clefts in a biotite-rich granite gneiss
Associated Minerals at type locality:
Xenotime-(Y)Synchysite GroupSenaiteRutileQuartz
PyriteMuscoviteDessauite-(Y)BrookiteApatite-(CaF)
AnataseAlbite

Physical Properties of Gramaccioliite-(Y)

Lustre:Greasy, Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:black
Streak:black
Hardness (Mohs):6
Tenacity:Brittle
Cleavage:None Observed
Fracture:Conchoidal
Density (measured):4.66 g/cm3

Crystallography of Gramaccioliite-(Y)

Crystal System:Trigonal
Class (H-M):3 - Rhombohedral
Cell Parameters:a = 10.41Å, c = 20.97Å
Ratio:a:c = 1 : 2.014
Unit Cell Volume:V 1,968.02 ų (Calculated from Unit Cell)
Morphology:six-sided tabular crystals (pseudohexagonal), often with a strongly corroded appearance
X-Ray Powder Diffraction:
d-spacingIntensity
3.00 (100)
2.89 (70)
2.26 (70)

Chemical Properties of Gramaccioliite-(Y)

Formula:
(Pb,Sr)(Y,Mn)(Ti,Fe
3+
 
)
 
18
Fe
3+
2
O
 
38
All elements listed in formula:Fe, Mn, O, Pb, Sr, Ti, Y

Relationship of Gramaccioliite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.CC.05Chrombismite
Bi
 
16
CrO
 
27
4.CC.10Freudenbergite
Na
 
2
(Ti,Fe)
 
8
O
 
16
4.CC.15Grossite
CaAl
 
4
O
 
7
4.CC.20Mayenite
Ca
 
12
Al
 
14
O
 
33
4.CC.25Yafsoanite
Ca
 
3
Zn
 
3
[TeO
 
6
]
 
2
4.CC.30Latrappite
(Ca,Na)(Nb,Ti,Fe)O
 
3
4.CC.30Lueshite
NaNbO
 
3
4.CC.30Natroniobite
NaNbO
 
3
4.CC.30Perovskite
CaTiO
 
3
4.CC.30Barioperovskite
BaTiO
 
3
4.CC.30IMA2007-014
Ca(Zr,Sn,Ti)O
 
3
4.CC.35Loparite-(Ce)
(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O
 
3
4.CC.35Macedonite
PbTiO
 
3
4.CC.35Tausonite
SrTiO
 
3
4.CC.35Isolueshite
(Na,La,Ca)(Nb,Ti)O
 
3
4.CC.40Crichtonite
(Sr,La,Ce,Y)(Ti,Fe
3+
 
,Mn)
 
21
O
 
38
4.CC.40Davidite-(Ce)
(Ce,La)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
4.CC.40Davidite-(La)
(La,Ce)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
4.CC.40Davidite-(Y)
(Y,Ce,La,Ca,�)(U,Y)(Fe
3+
 
,Mg)
 
2
(Ti,Fe
3+
 
,Cr,�)
 
18
O
 
38
4.CC.40Landauite
NaMnZn
 
2
(Ti,Fe)
 
6
Ti
 
12
O
 
38
4.CC.40Lindsleyite
(Ba,Sr)(Ti,Zr,Fe,Cr)
 
21
O
 
38
4.CC.40Loveringite
(Ca,Ce)(Ti,Fe,Cr,Mg)
 
21
O
 
38
4.CC.40Mathiasite
K(Ti,Cr,Fe,Mg,Zr)
 
21
O
 
38
4.CC.40Senaite
Pb(Ti,Fe,Mn)
 
21
O
 
38
4.CC.40Dessauite-(Y)
(Sr,Pb)(Y,U)(Ti,Fe
3+
 
)
 
20
O
 
38
4.CC.40Cleusonite
(Pb,Sr)(U
4+
 
,U
6+
 
)(Fe
2+
 
,Zn)
 
2
(Ti,Fe
2+
 
,Fe
3+
 
)
 
18
(O,OH)
 
38
4.CC.45Diaoyudaoite
NaAl
 
11
O
 
17
4.CC.45Hawthorneite
BaMgTi
 
3
Cr
 
4
Fe
 
4
O
 
19
4.CC.45Hibonite
(Ca,Ce)(Al,Fe,Ti,Si,Mg)
 
12
O
 
19
4.CC.45Lindqvistite
Pb
 
2
(Mg,Fe)Fe
 
16
O
 
27
4.CC.45Magnetoplumbite
(Pb,Mn)(Fe,Mn)
 
12
O
 
19
4.CC.45Plumboferrite
PbFe
 
4
O
 
7
4.CC.45Yimengite
K(Cr,Ti,Fe,Mg)
 
12
O
 
19
4.CC.45Haggertyite
Ba[Fe
2+
6
Ti
 
5
Mg]O
 
19
4.CC.45Nežilovite
PbZn
 
2
(Mn
4+
 
,Ti
4+
 
)
 
2
Fe
3+
8
O
 
19
4.CC.45Batiferrite
Ba[Ti
 
2
Fe
3+
8
Fe
2+
2
]O
 
19
4.CC.50Jeppeite
(K,Ba)
 
2
(Ti,Fe)
 
6
O
 
13
4.CC.55Zenzénite
Pb
 
3
(Fe,Mn)
 
4
Mn
 
3
O
 
13
4.CC.60Mengxianminite
(Ca,Na)
 
3
(Fe,Mn)
 
2
Mg
 
2
(Sn,Zn)
 
5
Al
 
8
O
 
29

Other Names for Gramaccioliite-(Y)

Synonyms:
IMA2001-034
Other Languages:
Russian:Грамаччиолиит-(Y)

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 Gramaccioliite-(Y)

Reference List:Piccoli, G.C. (1981): Davidite di Pianche di Vinadio (CN). Prima segnalazione. Rivista Mineralogica Italiana, 1981, 19-22.
Orlandi, P., Pasero, M., Rotiroti, N., Olmi, F., Demartin, F. (2004): Gramaccioliite-(Y), a new mineral of the crichtonite group from Stura Valley, Piedmont, Italy. European Journal of Mineralogy, 16, 171-175.
Orlandi, P. & Piccoli, G.C. (2004): Gramaccioliite-(Y) un nuovo minerale alpino del gruppo della crichtonite. Rivista Mineralogica Italiana, 1/2004, 16-17.

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    Localities for Gramaccioliite-(Y)

    (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
     
    • Piedmont
      • Cuneo Province
        • Stura Valley
    		P. Orlandi, G.C. Piccoli: Riv. Mineral. Ital. 28(1):16-18 (2004)
    Switzerland
     
    • Bern
      • Hasli Valley
    		Ruef, A. Senait-Kristalle aus dem Oberaar.Schweizer Strahler 11/3, 1997
    Mineral and/or Locality
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