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Gramaccioliite-(Y)

Big Photo

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

Show Gramaccioliite-(Y) Photos (3)
Formula:
(Pb,Sr)(Y,Mn)Fe
3+
2
(Ti,Fe
3+
 
)
 
18
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.


A member of the Crichtonite Group.

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

Relationship of Gramaccioliite-(Y) to other Species

Member of Group:
Crichtonite Group:
AB
 
21
O
 
38
 or A{BC
 
2
D
 
6
 E
 
12
}O
 
38
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.30Lakargiite
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)
(La,Ce,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
 
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
Pb
 
2
Fe
3+
11-x
Mn
2+
x
O
 
19-2x
, x = 1/3
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.45IMA2009-027
(Fe,Mg)Al
 
12
O
 
19
4.CC.45IMA2009-030
BaFe
3+
12
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.

Internet Links for Gramaccioliite-(Y)

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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
    Google
     
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