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Cascandite

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Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
© Knut Eldjarn

Show Cascandite Photos (2)
Formula:
Ca(Sc,Fe
3+
 
)[HSi
 
3
O
 
9
]
System:TriclinicHardness:4½ - 5½
Name:For the dominant cations, calcium and scandium
This page provides mineralogical data about Cascandite.

Classification of Cascandite

IMA status:Approved 1980
Strunz 8th edition ID:8/F.18-50
Nickel-Strunz 10th (pending) edition ID:9.DG.07

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
Dana 8th edition ID:65.2.1.6

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
2 : Single-Width Unbranched Chains, W=1 with chains P=3
Hey's CIM Ref.:14.8.14

14 : Silicates not Containing Aluminum
8 : Silicates of Group III metals other than Al
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Type Occurrence of Cascandite

Type Locality:Diverio quarry, Omegna, Verbano-Cusio-Ossola Province, Piedmont, Italy
Year of Discovery:1982

Physical Properties of Cascandite

Hardness (Mohs):4½ - 5½

Crystallography of Cascandite

Crystal System:Triclinic
Cell Parameters:a = 9.79Å, b = 10.42Å, c = 7.07Å
α = 98.91°, β = 102.63°, γ = 84.17°
Ratio:a:b:c = 0.94 : 1 : 0.679
Unit Cell Volume:V 693.56 ų (Calculated from Unit Cell)

Optical Data of Cascandite

Type:Biaxial
RI values: nα = 1.663 nγ = 1.684
Maximum Birefringence:δ = 0.021

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

Chemical Properties of Cascandite

Formula:
Ca(Sc,Fe
3+
 
)[HSi
 
3
O
 
9
]
Essential elements:Ca, H, O, Sc, Si
All elements listed in formula:Ca, Fe, H, O, Sc, Si
Common Impurities:Ti,Al,Mn,Mg,Na

Relationship of Cascandite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DG.05Bustamite
(Mn
2+
 
,Ca)[SiO
 
3
]
9.DG.05Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DG.05Pectolite
NaCa
 
2
[HSi
 
3
O
 
9
]
9.DG.05Sérandite
Na(Mn
2+
 
,Ca)
 
2
[HSi
 
3
O
 
9
]
9.DG.05Wollastonite
Ca[SiO
 
3
]
9.DG.05Wollastonite-1A
CaSiO
 
3
9.DG.10Clinotobermorite
Ca
 
5
[Si
 
3
O
 
8
(OH)
 
2
]2.4H
 
2
O - Ca
 
5
[Si
 
6
O17]·5H
 
2
O
9.DG.10Plombièrite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·7H
 
2
O
9.DG.10Riversideite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·2H
 
2
O
9.DG.10Tobermorite
Ca
 
5
Si
 
6
(O,OH)
 
18
·5H
 
2
O
9.DG.15Foshagite
Ca
 
4
[(OH)
 
2
|Si
 
3
O
 
9
]
9.DG.20Jennite
Ca
 
9
H
 
2
Si
 
6
O
 
18
(OH)
 
8
·6H
 
2
O
9.DG.25Paraumbite
K
 
3
Zr
 
2
H(Si
 
3
O
 
9
)
 
2
·nH
 
2
O
9.DG.25Umbite
K
 
2
(Zr,Ti)Si
 
3
O
 
9
·H
 
2
O
9.DG.30Sørensenite
Na
 
4
SnBe
 
2
Si
 
6
O
 
16
(OH)
 
4
9.DG.35Xonotlite
Ca
 
6
Si
 
6
O
 
17
(OH)
 
2
9.DG.40Hillebrandite
Ca
 
2
[(OH)
 
2
|SiO
 
3
]
9.DG.45Zorite
Na
 
2
Ti(Si,Al)
 
3
O
 
9
·nH
 
2
O
9.DG.45Chivruaiite
Ca
 
3
Ti
 
5
[(Si
 
6
O
 
17
)
 
2
|O(OH)
 
4
]·14H
 
2
O
9.DG.50Haineaultite
(Na,Ca)
 
5
Ca(Ti,Nb)
 
5
(OH,F)
 
4
|Si
 
6
O
 
17
]
 
2
 · 5H
 
2
O
9.DG.55Epididymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
9.DG.60Eudidymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
9.DG.65Elpidite
Na
 
2
ZrSi
 
6
O
 
15
·3H
 
2
O
9.DG.70Fenaksite
(K,Na)
 
4
(Fe,Mn)
 
2
(Si
 
4
O
 
10
)
 
2
(OH,F)
9.DG.70Litidionite
CuNaKSi
 
4
O
 
10
9.DG.70Manaksite
KNaMnSi
 
4
O
 
10
9.DG.75Tinaksite
K
 
2
Na(Ca,Mn
2+
 
)
 
2
Ti[O|Si
 
7
O
 
18
(OH)]
9.DG.75Tokkoite
K
 
2
Ca
 
4
Si
 
7
O
 
17
(O,OH,F)
 
4
9.DG.75Senkevichite
CsKNaCa
 
2
Ti[O|Si
 
7
O
 
18
(OH)]
9.DG.80Canasite
Ca
 
5
Na
 
4
K
 
2
(Si
 
12
O
 
30
(OH,F)
 
4
9.DG.80Fluorcanasite
K
 
3
Na
 
3
Ca
 
5
Si
 
12
O
 
30
F
 
4
·H
 
2
O
9.DG.85Miserite
K(Ca,Ce)
 
4
Si
 
5
O
 
13
(OH)
 
3
9.DG.90Charoite
(K,Na)
 
5
(Ca,Ba,Sr)
 
8
(Si
 
6
O
 
15
)
 
2
(Si
 
6
O
 
16
)(OH,F)·H
 
2
O
9.DG.90Frankamenite
K
 
3
Na
 
3
Ca
 
5
(Si
 
12
O
 
30
)[F,(OH)]
 
4
·H
 
2
O
9.DG.95Yuksporite
(K,Ba)NaCa
 
2
(Si,Ti)
 
4
O
 
11
(F,OH)·H
 
2
O
9.DG.95Eveslogite
(Na,K,Ca,Sr,Ba)
 
48
 [(Ti,Nb,Mn,Fe
2+
 
)
 
12
Si
 
48
O
 
144
(OH)
 
12
](F,OH,Cl)
 
14
Related Minerals - Hey's Index Grouping:

- +
14.8.1Thalénite-(Y)
Y
 
3
Si
 
3
O
 
10
(OH)
14.8.2Keiviite-(Y)
(Y,Yb)
 
2
[Si
 
2
O
 
7
]
14.8.3Keiviite-(Yb)
(Yb,Y)
 
2
[Si
 
2
O
 
7
]
14.8.4Tombarthite-(Y)
Y
 
4
[HSiO
 
4
]
 
3
14.8.5Thortveitite
(Sc,Y)
 
2
[Si
 
2
O
 
7
]
14.8.6Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
14.8.7Monteregianite-(Y)
(Na,K)
 
6
(Y,Ca)
 
2
Si
 
16
O
 
38
·10H
 
2
O
14.8.8Iraqite-(La)
K(Ca,Na)
 
2
(La,Ce,Th)[(Si,Al)
 
8
O
 
20
]
14.8.9Ashcroftine-(Y)
K
 
5
Na
 
5
(Y,Ca)
 
12
Si
 
28
O
 
70
(OH)
 
2
(CO
 
3
)
 
8
·8H
 
2
O
14.8.10Nordite-(La)
(La,Ce)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
14.8.11Nordite-(Ce)
(Ce,La)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
14.8.12Jervisite
(Na,Ca,Fe
2+
 
)(Sc,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
14.8.13Cerite-(Ce)
(Ce,Ca)
 
9
(Mg,Fe)Si
 
7
(O,OH,F)
 
28

Other Names for Cascandite

Synonyms:
IMA1980-011
Other Languages:
German:Cascandit
Russian:Каскандит
Spanish:Cascandita

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 Cascandite

Reference List:Mellini M. & Merlino S.(1982): The crystal structure of cascandite, CaScSi3O8(OH). American Mineralogist: 67, 604-609.

Mellini M., Merlino S., Orlandi P., Rinaldi R.(1982): Cascandite and jervisite, two new scandium silicates from Baveno, Italy: American Mineralogist: 67, 599-603.

Articles/Blogs about Cascandite

Internet Links for Cascandite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    Localities for Cascandite

    (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
        • Baveno
          • Oltrefiume
            • Mount Camoscio
    		Mellini M., Merlino S., Orlandi P., Rinaldi R..(1982): Cascandite and jervisite, two new scandium silicates from Baveno, Italy. Am. Mineral., 67, 599-603. and [MinRec 14:157]
        • Omegna
          • Agrano
    		Lapis, 13 (9), 29-33+42.
    Mellini, M., Merlino, S., Orlandi, P., Rinaldi, R. (1982): Cascandite and jervisite, two new scandium silicates from Baveno, Italy. American Mineralogist, 67, 599-603.
    Am Min 90:1442-1452
    Norway
     
    • Telemark
      • Drangedal
        • Tørdal
    		No reference listed
    Mineral and/or Locality
    Google
     
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