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Roggianite

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Alpe Rosso, Orcesco, Vigezzo Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy
© G.Fraccaro

Show Roggianite Photos (7)
Formula:
Ca
 
2
Be(OH)
 
2
Al
 
2
Si
 
4
O
 
13
·2.5H
 
2
O
System:TetragonalColour:White, pale yellow
Name:Named after Aldo G. Roggiani, Italian science teacher who found the first specimen.


Zeolite Group.

Classification of Roggianite

IMA status:Approved
Strunz 8th edition ID:8/J.19-10
Nickel-Strunz 10th (pending) edition ID:9.GB.20

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
B : Chains of single connected 4-membered rings
Dana 8th edition ID:77.1.7.4

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
Hey's CIM Ref.:16.10.29

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
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Type Occurrence of Roggianite

Type Locality:Alpe Rosso, Orcesco, Vigezzo Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy
Year of Discovery:1969

Physical Properties of Roggianite

Colour:White, pale yellow

Crystallography of Roggianite

Crystal System:Tetragonal
Cell Parameters:a = 18.33Å, c = 9.16Å
Ratio:a:c = 1 : 0.5
Unit Cell Volume:V 3,077.66 ų (Calculated from Unit Cell)

Optical Data of Roggianite

Type:Uniaxial (+)
RI values: nω = 1.527 nε = 1.535
Maximum Birefringence:δ = 0.008

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Roggianite

Formula:
Ca
 
2
Be(OH)
 
2
Al
 
2
Si
 
4
O
 
13
·2.5H
 
2
O
Essential elements:Al, Be, Ca, H, O, Si
All elements listed in formula:Al, Be, Ca, H, O, Si
Common Impurities:Sr,Na,K

Relationship of Roggianite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.GB.05Ammonioleucite
(NH
 
4
,K)AlSi
 
2
O
 
6
9.GB.05Analcime
Na
 
2
[Al
 
2
Si
 
4
O
 
12
] · 2H
 
2
O
9.GB.05Hsianghualite
Ca
 
3
Li
 
2
Be
 
3
[F
 
2
|(SiO
 
4
)
 
3
]
9.GB.05Lithosite
K
 
6
Al
 
4
Si
 
8
O
 
25
·2H
 
2
O
9.GB.05Leucite
KAlSi
 
2
O
 
6
9.GB.05Pollucite
(Cs,Na)
 
2
[Al
 
2
Si
 
4
O
 
12
] · 2H
 
2
O
9.GB.05Wairakite
Ca[Al
 
2
Si
 
4
O
 
12
] · 2H
 
2
O
9.GB.10Laumontite
CaAl
 
2
Si
 
4
O
 
12
·4H
 
2
O
9.GB.15Yugawaralite
CaAl
 
2
Si
 
6
O
 
16
·4H
 
2
O
9.GB.25Goosecreekite
Ca[Al
 
2
Si
 
6
O
 
16
] · 5H
 
2
O
9.GB.30Montesommaite
(K,Na)
 
9
Al
 
9
Si
 
23
O
 
64
·10H
 
2
O
9.GB.35Parthéite
CaAl
 
2
Si
 
2
O
 
8
·2H
 
2
O
Related Minerals - Hey's Index Grouping:
16.10.1Bytownite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
16.10.2Lisetite
CaNa
 
2
Al
 
4
Si
 
4
O
 
16
16.10.4Thomsonite-Ca
NaCa
 
2
[Al
 
5
Si
 
5
O
 
20
] · 6H
 
2
O
16.10.5Gonnardite
Na
 
2
Ca[Al
 
2
Si
 
3
O
 
10
]
 
2
 · 7H
 
2
O
16.10.6Mesolite
Na
 
2
Ca
 
2
[Al
 
2
Si
 
3
O
 
10
]
 
3
 · 8H
 
2
O
16.10.7Faujasite
16.10.8Garronite
Na
 
2
Ca
 
5
Al
 
12
Si
 
20
O
 
64
·27H
 
2
O
16.10.9Boggsite
Ca
 
8
Na
 
3
(Si,Al)
 
96
O
 
192
·70H
 
2
O
16.10.10Herschelite
16.10.11Phillipsite
16.10.12Fedorite
KNa
 
4
Ca
 
4
[HSi
 
4
O
 
10
]
 
4
 · 6H
 
2
O
16.10.13Willhendersonite
KCa[Al
 
3
Si
 
3
O
 
12
] · 5H
 
2
O
16.10.14Barrerite
(Na,K,Ca
 
0.5
)
 
2
[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
16.10.15Mordenite
(Na
 
2
,Ca,K
 
2
)Al
 
2
Si
 
10
O
 
24
·7H
 
2
O
16.10.16Reyerite
(Na,K)
 
2
Ca
 
14
(Si,Al)
 
24
O
 
58
(OH)
 
8
·6H
 
2
O
16.10.17Lévyne
16.10.18Clinoptilolite
16.10.19Heulandite
16.10.20Gobbinsite
Na
 
4
(Ca,Mg,K
 
2
)Al
 
6
Si
 
10
O
 
32
·12H
 
2
O
16.10.21Stilbite
16.10.22Dachiardite
(Na,K,Ca
 
0
·5)
 
4
(Al
 
4
Si
 
20
)O
 
48
·18H
 
2
O
16.10.23Offretite
KCaMgAl
 
5
Si
 
13
O
 
36
·16H
 
2
O or near
16.10.24Perlialite
K
 
9
Na(Ca,Sr)[Al
 
2
Si
 
4
O
 
12
]
 
6
 · 15H
 
2
O
16.10.25Erionite
16.10.26Paulingite
16.10.27Sodium Dachiardite
(Na
 
2
,Ca,K
 
2
)
 
4-5
Al
 
8
Si
 
40
O
 
96
·26H
 
2
O
16.10.28Mazzite-Mg
K
 
2
Mg
 
2
Ca
 
1.5
Al
 
9.5
Si
 
26.5
O
 
72
·28H
 
2
O or near

Other Names for Roggianite

Synonyms:
Ginzburgite (of Voloshin et al.)
German names:
Roggianit
Russian names:
Роджианит
Spanish names:
Roggianita

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 Roggianite

Reference List:Passaglia E. (1969): Roggianite, a new silicate mineral. Clay Minerals, 8, 107-111.

Gard, J.A. (1969): An electron microscope and diffraction study of roggianite. Clay Minerals, 8, 112-113.

Passaglia, E. & Vezzalini, G. (1969): Roggianite: revised chemical formula and zeolitic properties. Mineralogical Magazine, 52, 201-206.

Gard, J.A. (1970): Studio per microscopia elettronica e per difrattometria della roggianite. Ceramica Informazione, 45.

Laghi, G.F. (1970): Le rocce che accompagnano la pegmatite a roggianite della Val Vigezzo (Novara).

L’Illustrazione Ossolana, 12, 97-100.

Boscardin, M. (1972): Roggianite un nuovo minerale. Notiziario del Gruppo Mineralogico Lombardo, 1972, 7.

Vezzalini, G. & Mattioli, V. (1979): Secondo ritrovamento della roggianite. Periodico di Mineralogia, 48, 15-20.

Galli, E. (1980): The crystal structure of roggianite, a zeolite-like silicate. Proceedings of the 5th International Conference Zeolites, Heyden, London, 205-213.

Passaglia, E. (1980): Nuovi silicati descritti dai ricercatori dell'Istituto di Mineralogia dell'Università di Modena: roggianite. Rivista Mineralogica Italiana, 1980, 16-19.

Galli, E. (1983): The crystal structure of roggianite, a zeolite-like silicate. Mineralnotes, 1983, 1-5.

Mattioli, V. (1987): Notizie sulla roggianite. Rivista Mineralogica Italiana, 1987, 93-95.

Passaglia, E. & Vezzalini, G. (1988): Roggianite: revised chemical formula and zeollite properties. Mineralogical Magazine, 52, 201-206.

Giuseppetti, G., Mazzi, F., Tadini, C. & Galli, E. (1991): The revised crystal structure of roggianite: Ca2[Be(OH)2Al2Si4O13]<2.5H2O. Neues Jahrbuch für Mineralogie, Monatschefte (1991): 307-314.

Internet Links for Roggianite

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  • Raman and XRD data at RRUFF project
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    Localities for Roggianite

    (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
      • Verbano-Cusio-Ossola Province
        • Ossola Valley
          • Vigezzo Valley
            • Orcesco
    		Mattioli V. (1987) - Novità mineralogiche in Val d'Ossola - Rivista Mineralogica Italiana, Milano, fasc. 1, pp.1-11
            • Trontano
    		Vezzalini G., Mattioli V. (1979) - Secondo ritrovamento della roggianite. Periodico di Mineralogia, Roma, pp. 15-20.
    Mineral and/or Locality
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