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Kamaishilite

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Formula:
Ca
 
2
(Al
 
2
SiO
 
6
)(OH)
 
2
System:TetragonalColour:colourless
Dimorph of:Bicchulite
This page provides mineralogical data about Kamaishilite.

Classification of Kamaishilite

IMA status:Approved
Strunz 8th edition ID:8/J.11-60
Nickel-Strunz 10th (pending) edition ID:9.FB.10

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
B : Tektosilicates with additional anions
Dana 8th edition ID:76.2.3.6

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
Hey's CIM Ref.:16.9.11

16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca
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Type Occurrence of Kamaishilite

Type Locality:Kamaishi mine, Kamaishi City, Iwate Prefecture, Tohoku Region, Honshu Island, Japan
Year of Discovery:1981

Physical Properties of Kamaishilite

Diaphaneity (Transparency):Transparent
Colour:colourless

Crystallography of Kamaishilite

Crystal System:Tetragonal
Cell Parameters:a = 8.85Å, c = 8.77Å
Ratio:a:c = 1 : 0.991
Unit Cell Volume:V 686.89 ų (Calculated from Unit Cell)
Morphology:Grains to 0.1 mm.

Optical Data of Kamaishilite

Type:Uniaxial (-)
RI values: nω = 1.629 nε = 1.629
Maximum Birefringence:δ = 0.000

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

Chemical Properties of Kamaishilite

Formula:
Ca
 
2
(Al
 
2
SiO
 
6
)(OH)
 
2
Essential elements:Al, Ca, H, O, Si
All elements listed in formula:Al, Ca, H, O, Si
Common Impurities:Fe,Mg,H2O

Relationship of Kamaishilite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.FB.05Afghanite
(Na,Ca,K)
 
8
(Al
 
6
Si
 
6
O
 
24
)(Cl
 
2
,SO
 
4
,CO
 
3
)
 
3
 · 0.5H
 
2
O
9.FB.05Bystrite
(Na,K)
 
7
Ca(Al
 
6
Si
 
6
O
 
24
)(S
 
3
)
 
1.5
 · H
 
2
O
9.FB.05Cancrinite
(Na,Ca,☐)
 
8
(Al
 
6
Si
 
6
O
 
24
)(CO
 
3
,SO
 
4
)
 
2
 · 2H
 
2
O
9.FB.05Cancrisilite
Na
 
7
(Al
 
5
Si
 
7
O
 
24
)(CO
 
3
) · 3H
 
2
O
9.FB.05Davyne
(Na,K)
 
6
Ca
 
2
(Al
 
6
Si
 
6
O
 
24
)(Cl
 
2
,SO
 
4
)
 
2
9.FB.05Franzinite
(Na,K)
 
6
Ca
 
2
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
)
 
2
 · 0.5H
 
2
O
9.FB.05Giuseppettite
(Na,K,Ca)
 
7-8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
,Cl)
 
1-2
9.FB.05Hydroxycancrinite
Na
 
8
(Al
 
6
Si
 
6
O
 
24
)(OH)
 
2
 · 2H
 
2
O
9.FB.05Liottite
(Na,K)
 
16
Ca
 
8
(Al
 
6
Si
 
6
O
 
24
)
 
3
(SO
 
4
)
 
5
Cl
 
4
9.FB.05Microsommite
Na
 
4
K
 
2
Ca
 
2
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
)Cl
 
2
9.FB.05Pitiglianoite
Na
 
6
K
 
2
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
) · 2H
 
2
O
9.FB.05Quadridavyne
(Na,K)
 
6
Ca
 
2
(Al
 
6
Si
 
6
O
 
24
)Cl
 
4
9.FB.05Sacrofanite
(Na,K)
 
98
Ca
 
20
(Al
 
6
Si
 
6
O
 
24
)
 
14
(SO
 
4
)
 
26
Cl
 
2
 · 8H
 
2
O
9.FB.05Tounkite
(Na,Ca,K)
 
8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
)
 
2
Cl · H
 
2
O
9.FB.05Vishnevite
(Na,K)
 
8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
,CO
 
3
) · 2H
 
2
O
9.FB.05Marinellite
(Na,K)
 
42
Ca
 
6
(Al
 
6
Si
 
6
O
 
24
)
 
6
(SO
 
4
)
 
8
Cl
 
2
 · 3H
 
2
O
9.FB.05Farneseite
(Na,Ca,K)
 
56
(Al
 
6
Si
 
6
O
 
24
)
 
7
(SO
 
4
)
 
12
 · 6H
 
2
O
9.FB.05Alloriite
(Na,Ca,K)
 
26
Ca
 
4
(Al
 
6
Si
 
6
O
 
24
)
 
4
(SO
 
4
)
 
6
Cl
 
6
9.FB.05Fantappièite
[Na
 
82.5
Ca
 
33
K
 
16.5
](Si
 
99
Al
 
99
O
 
396
)(SO
 
4
)
 
33
 · 4H
 
2
O
9.FB.05Kyanoxalite
Na
 
7
(Al
 
6-x
Si
 
6+x
O
 
24
)(C
 
2
O
 
4
)
 
0.5+x
 · 5H
 
2
O (0 < x < 0.5)
9.FB.05Balliranoite
(Na,K)
 
6
Ca
 
2
(Si
 
6
Al
 
6
O
 
24
)Cl
 
2
(CO
 
3
)
9.FB.05Carbobystrite
Na
 
8
(Al
 
6
Si
 
6
O
 
24
)(CO
 
3
) · 3.5H
 
2
O
9.FB.05Depmeierite
Na
 
8
(Al
 
6
Si
 
6
O
 
24
)(PO
 
4
,CO
 
3
)
 
1-x
 · 3H
 
2
O (x<0.5)
9.FB.05Kircherite
Na
 
5
Ca
 
2
K(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
)
 
2
 · 0.33H
 
2
O
9.FB.10Bicchulite
Ca
 
2
(Al
 
2
SiO
 
6
)(OH)
 
2
9.FB.10Danalite
Fe
2+
4
(Be
 
3
Si
 
3
O
 
12
)S
9.FB.10Genthelvite
Zn
 
4
(Be
 
3
Si
 
3
O
 
12
)S
9.FB.10Haüyne
(Na,Ca)
 
4-8
(Al
 
6
Si
 
6
(O,S)
 
24
)(SO
 
4
,Cl)
 
1-2
9.FB.10Helvite
Mn
2+
4
(Be
 
3
Si
 
3
O
 
12
)S
9.FB.10Lazurite
(Na,Ca)
 
8
(Al
 
6
Si
 
6
O
 
24
)(S,SO
 
4
,Cl
 
2
)
9.FB.10Nosean
Na
 
8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
)
9.FB.10Sodalite
Na
 
8
(Al
 
6
Si
 
6
O
 
24
)Cl
 
2
9.FB.10Tsaregorodtsevite
(N(CH
 
3
)
 
4
)(AlSi
 
5
O
 
12
)
9.FB.10Tugtupite
Na
 
4
(AlBeSi
 
4
O
 
12
)Cl
9.FB.10Helvine
9.FB.15Marialite
Na
 
4
Al
 
3
Si
 
9
O
 
24
Cl
9.FB.15Meionite
Ca
 
4
Al
 
6
Si
 
6
O
 
24
CO
 
3
9.FB.15Silvialite
(Ca,Na)
 
4
[(SO
 
4
,CO
 
3
)|(Al
 
2
Si
 
2
O
 
8
)
 
3
]
Related Minerals - Hey's Index Grouping:

- +
16.9.1Gehlenite
Ca
 
2
Al(AlSiO
 
7
)
16.9.2Anorthite
CaAl
 
2
Si
 
2
O
 
8
16.9.3Yoshiokaite
(Ca,Na)[Al(Al,Si)O
 
4
]
16.9.4Svyatoslavite
CaAl
 
2
Si
 
2
O
 
8
16.9.5Dmisteinbergite
CaAl
 
2
Si
 
2
O
 
8
16.9.6Grossular
Ca
 
3
Al
 
2
(SiO
 
4
)
 
3
16.9.7Vuagnatite
CaAl(SiO
 
4
)(OH)
16.9.8Zoisite
{Ca
 
2
}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
16.9.9Clinozoisite
{Ca
 
2
}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
16.9.10Prehnite
Ca
 
2
Al
 
2
Si
 
3
O
 
12
(OH)
16.9.12Bicchulite
Ca
 
2
(Al
 
2
SiO
 
6
)(OH)
 
2
16.9.13Margarite
CaAl
 
2
(Al
 
2
Si
 
2
O
 
10
)(OH)
 
2
16.9.14Chantalite
CaAl
 
2
(SiO
 
4
)(OH)
 
4
16.9.15Cebollite
Ca
 
5
Al
 
2
(SiO
 
4
)
 
3
(OH)
 
4
16.9.17Katoite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
3-x
(OH)
 
4x
16.9.18Lawsonite
CaAl
 
2
(Si
 
2
O
 
7
)(OH)
 
2
 · H
 
2
O
16.9.19Parthéite
CaAl
 
2
Si
 
2
O
 
8
 · 2H
 
2
O
16.9.20Wairakite
Ca(Al
 
2
Si
 
4
O
 
12
) · 2H
 
2
O
16.9.21Vertumnite
Ca
 
4
Al
 
4
Si
 
4
O
 
6
(OH)
 
24
 · 3H
 
2
O
16.9.22Scolecite
CaAl
 
2
Si
 
3
O
 
10
 · 3H
 
2
O
16.9.23Laumontite
CaAl
 
2
Si
 
4
O
 
12
 · 4H
 
2
O
16.9.24Yugawaralite
CaAl
 
2
Si
 
6
O
 
16
 · 4H
 
2
O
16.9.25Gismondine-Ca
CaAl
 
2
Si
 
2
O
 
8
 · 4H
 
2
O
16.9.26Epistilbite
CaAl
 
2
Si
 
6
O
 
16
 · 5H
 
2
O
16.9.27Goosecreekite
Ca[Al
 
2
Si
 
6
O
 
16
] · 5H
 
2
O
16.9.28Cowlesite
CaAl
 
2
Si
 
3
O
 
10
 · 6H
 
2
O
16.9.30Stellerite
Ca[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
16.9.31Strätlingite
Ca
 
2
Al
 
2
SiO
 
7
 · 8H
 
2
O
16.9.32Amstallite
CaAl(Si,Al)
 
4
O
 
8
(OH)
 
4
 · (H
 
2
O,Cl)

Other Names for Kamaishilite

Synonyms:
IMA1980-052
Other Languages:
German:Kamaishilit
Spanish:Kamaishilita

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 Kamaishilite

Reference List:

- +
American Mineralogist (1982): 67: 85.

Internet Links for Kamaishilite

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    • Localities for Kamaishilite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (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.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Iwate Prefecture
          • Kamaishi City
    		Proc.Japan.Acad.(1981) 57B, 239-243
    Romania
     
    • Hunedoara Co.
      • Hunedoara
    		The Canadian Mineralogist Vol. 39, pp. 1405-1434 (2001)
    Mineral and/or Locality
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