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Stronalsite

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Mt Ohsa (Ohsayama; Osayama), Ohsa-cho, Okayama prefecture, Chugoku region, Honshu Island, Japan
© 2008, J. Weissman

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Formula:
SrNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
System:OrthorhombicColour:White
Hardness:6½
Name:The name reflects its composition: a strontium, sodium (latin "natrium"), aluminium silicate.


Feldspar Group

Classification of Stronalsite

IMA status:Approved 1983
Strunz 8th edition ID:8/J.07-90
Nickel-Strunz 10th (pending) edition ID:9.FA.60

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
Dana 8th edition ID:76.1.6.2

76 : TECTOSILICATES Al-Si Framework
1 : Al-Si Framework with Al-Si frameworks
Hey's CIM Ref.:16.12.1

16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn
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Type Occurrence of Stronalsite

Type Locality:Tanaka Olivine Mining Co. quarry, Rendai, Kochi City, Kochi Prefecture, Shikoku Island, Japan
Year of Discovery:1985
Geological Setting of type material:Veinlets in xenoliths in serpentine.

Physical Properties of Stronalsite

Lustre:Vitreous
Colour:White
Streak:White
Hardness (Mohs):6½
Cleavage:None Observed
Parting:Rectangular
Density (measured):2.95 g/cm3
Density (calculated):2.95 g/cm3

Crystallography of Stronalsite

Crystal System:Orthorhombic
Cell Parameters:a = 8.41Å, b = 9.9Å, c = 16.72Å
Ratio:a:b:c = 0.849 : 1 : 1.689
Unit Cell Volume:V 1,392.09 ų (Calculated from Unit Cell)
Z:4

Optical Data of Stronalsite

Type:Biaxial (+)
RI values: nα = 1.563 nβ = 1.564 nγ = 1.574
2V:Measured: 32° , Calculated: 36°
Maximum Birefringence:δ = 0.011

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

Chemical Properties of Stronalsite

Formula:
SrNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
Essential elements:Al, Na, O, Si, Sr
All elements listed in formula:Al, Na, O, Si, Sr
Common Impurities:Ba,Ca,Sr

Relationship of Stronalsite to other Species

Member of Group:
Feldspar Group:
Related Minerals - Nickel-Strunz Grouping):

- +
9.FA.05Kaliophilite
K[AlSiO
 
4
]
9.FA.05Kalsilite
K[AlSiO
 
4
]
9.FA.05Nepheline
(Na,K)[AlSiO
 
4
]
9.FA.05Panunzite
(Na,K)[AlSiO
 
4
]
9.FA.05Trikalsilite
(Na,K)[AlSiO
 
4
]
9.FA.05Yoshiokaite
(Ca,Na)[Al(Al,Si)O
 
4
]
9.FA.05Megakalsilite
KAlSiO
 
4
9.FA.10Malinkoite
NaBSiO
 
4
9.FA.15Virgilite
LiAlSi
 
2
O
 
6
9.FA.25Lisitsynite
KBSi
 
2
O
 
6
9.FA.30Adularia
KAlSi
 
3
O
 
8
9.FA.30Anorthoclase
(Na,K)[AlSi
 
3
O
 
8
]
9.FA.30Buddingtonite
(NH
 
4
)[AlSi
 
3
O
 
8
]
9.FA.30Celsian
Ba[Al
 
2
Si
 
2
O
 
8
]
9.FA.30Hyalophane
(K,Ba)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.30Microcline
K[AlSi
 
3
O
 
8
]
9.FA.30Orthoclase
K[AlSi
 
3
O
 
8
]
9.FA.30Sanidine
K[AlSi
 
3
O
 
8
]
9.FA.30Rubicline
(Rb,K)[AlSi
 
3
O
 
8
]
9.FA.30Monalbite
Na[AlSi
 
3
O
 
8
]
9.FA.35Albite
Na[AlSi
 
3
O
 
8
]
9.FA.35Andesine
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.35Anorthite
Ca[Al
 
2
Si
 
2
O
 
8
]
9.FA.35Bytownite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
9.FA.35Labradorite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
9.FA.35Oligoclase
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.35Reedmergnerite
Na[BSi
 
3
O
 
8
]
9.FA.40Paracelsian
Ba[Al
 
2
Si
 
2
O
 
8
]
9.FA.45Svyatoslavite
Ca[Al
 
2
Si
 
2
O
 
8
]
9.FA.45Kumdykolite
NaAlSi
 
3
O
 
8
9.FA.50Slawsonite
(Sr,Ca)[Al
 
2
Si
 
2
O
 
8
]
9.FA.55Lisetite
CaNa
 
2
Al
 
4
Si
 
4
O
 
16
9.FA.60Banalsite
BaNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
9.FA.65Danburite
CaB
 
2
Si
 
2
O
 
8
9.FA.65Maleevite
BaB
 
2
Si
 
2
O
 
8
9.FA.65Pekovite
SrB
 
2
Si
 
2
O
 
8
9.FA.70Lingunite
(Na,Ca)AlSi
 
3
O
 
8
9.FA.75Kokchetavite
KAlSi
 
3
O
 
8
Related Minerals - Hey's Index Grouping:

- +
16.12.2Slawsonite
(Sr,Ca)[Al
 
2
Si
 
2
O
 
8
]
16.12.3Brewsterite
16.12.4Celsian
Ba[Al
 
2
Si
 
2
O
 
8
]
16.12.5Paracelsian
Ba[Al
 
2
Si
 
2
O
 
8
]
16.12.6Cymrite
BaAl
 
2
Si
 
2
(O,OH)
 
8
·H
 
2
O
16.12.7Edingtonite
Ba[Al
 
2
Si
 
3
O
 
10
] · 4H
 
2
O
16.12.8Banalsite
BaNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
16.12.9Harmotome
(Ba
 
0.5
,Ca
 
0.5
,K,Na)
 
5
[Al
 
5
Si
 
11
O
 
32
] ·12H
 
2
O
16.12.10Hyalophane
(K,Ba)[Al(Si,Al)Si
 
2
O
 
8
]
16.12.11Balipholite
BaLiMg
 
2
Al
 
3
[(OH)
 
4
|Si
 
2
O
 
6
]
 
2
16.12.12Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
·2H
 
2
O
16.12.13Wellsite
(Ba,Ca,K
 
2
)Al
 
2
Si
 
6
O
 
16
·6H
 
2
O
16.12.14Merlinoite
(K,Na)
 
5
(Ca,Ba)
 
2
Al
 
9
Si
 
23
O
 
64
·23H
 
2
O
16.12.15Anandite
(Ba,K)(Fe
2+
 
,Mg)
 
3
[(O,OH)
 
2
|(Si,Al,Fe)
 
4
O
 
10
]
16.12.16Fraipontite
(Zn,Al)
 
3
[(OH)
 
4
|(Si,Al)
 
2
O
 
5
]
16.12.17Sauconite
Na
 
0.3
Zn
 
3
(Si,Al)
 
4
O
 
10
(OH)
 
2
·4H
 
2
O
16.12.18Minehillite
(K,Na)
 
2-3
Ca
 
28
Zn
 
4
Al
 
4
Si
 
40
O
 
112
(OH)
 
16
16.12.19Hendricksite
K(Zn,Mg,Mn
2+
 
)
 
3
[(OH)
 
2
|AlSi
 
3
O
 
10
]
16.12.20Baileychlore
(Zn,Fe,Al,Mg)
 
6
(Si,Al)
 
4
O
 
10
(OH)
 
8

Other Names for Stronalsite

Synonyms:
IMA1983-016
Other Languages:
German:Stronalsit
Japanese:ストロナルサイト
Spanish:Stronalsita

Other Information

Fluorescence in UV light:None
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 Stronalsite

Reference List:Hidemichi Hori, Izumi Nakai, Kozo Nagashima, Satoshi Matsubara and Akira Kato (1986) Stronalsite, SrNa2Al4Si4O16, a new mineral from Rendai, Kochi City, Japan. Mineralogical Journal Vol. 13 (1986) , No. 6 pp368-375

Bulletin of the National Science Museum Tokyo (1985), series C: 11: 37-95.

American Mineralogist (1987): 72: 226.

American Mineralogist (1988): 73: 195.

Internet Links for Stronalsite

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    Localities for Stronalsite

    (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
      • Chubu Region
        • Niigata Prefecture
    		Miyajima, H. et al., abstract J038-003, in www-jm.eps.s.u-tokyo.ac.jp/ 2002cd-rom/pdf/j038/j038-003_e.pdf
      • Chugoku region
        • Okayama prefecture
          • Ohsa-cho
    		Mineralogical Journal Vol. 13 (1986) , No. 6 pp368-375
    • Shikoku Island
      • Kochi Prefecture
        • Kochi City
          • Rendai
    		Bull.Nat.Sci.Mus.Tokyo (1985) ser C, 11, 37-95; Mineralogical Journal Vol. 13 (1986) , No. 6 pp368-375
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
    		P.M. Kartashov data
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    		www.koeln.netsurf.de/~w.steffens/khib.htm
    South Africa
     
    • Northwest Province
      • Western Bushveld Complex
        • Rustenburg District
          • Pilansberg Complex
    		The Canadian Mineralogist, V 42, 2004, pp. 1169-1178.
    Spain
     
    • Canary Islands
      • Las Palmas Province
        • Fuerteventura
    		Ahijado et al (2005) Mineralogy and Petrology, 84, #1-2, 107-127.
    Mineral and/or Locality
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