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Alumoåkermanite

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Big Photo

Odikhincha massif, Maimecha and Kotui Rivers Basin, Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai), Eastern-Siberian Region, Russia
© Pavel M. Kartashov

Show Alumoåkermanite Photos (2)



Formula:
(Ca,Na)
 
2
(Al,Mg,Fe
2+
 
)(Si
 
2
O
 
7
)
System:Tetragonal
Member of:Melilite Group
This page provides mineralogical data about Alumoåkermanite.

Classification of Alumoåkermanite

IMA status:Approved 2008
Nickel-Strunz 10th (pending) edition ID:9.BB.10

9 : SILICATES (Germanates)
B : Sorosilicates
B : Si2O7 groups, without non-tetrahedral anions; cations in tetrahedral [4] and greater coordination
Dana 8th edition ID:55.4.1.5

55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
4 : Si2O7 Groups, Generally with No Additional Anions with cations in [8] and lower coordination
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Type Occurrence of Alumoåkermanite

Type Locality:Mt. Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania

Crystallography of Alumoåkermanite

Crystal System:Tetragonal
Class (H-M):4 2m - Scalenohedral
Space Group:P4 21m
Cell Parameters:a = 7.766(4) Å, c = 5.0297(4) Å
Ratio:a:c = 1 : 0.648
Unit Cell Volume:V 303.35 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
3.712 (13)
3.075 (25)
2.859 (100)
2.456 (32)
1.830 (12)
1.757 (19)
1.736 (13)
1.386 (13)

Chemical Properties of Alumoåkermanite

Formula:
(Ca,Na)
 
2
(Al,Mg,Fe
2+
 
)(Si
 
2
O
 
7
)
Essential elements:Al, Ca, O, Si
All elements listed in formula:Al, Ca, Fe, Mg, Na, O, Si

Relationship of Alumoåkermanite to other Species

Member of:Melilite Group
Other Members of Group:

- +
Åkermanite
Ca
 
2
Mg(Si
 
2
O
 
7
)
Gehlenite
Ca
 
2
Al(AlSiO
 
7
)
Gugiaite
Ca
 
2
Be(Si
 
2
O
 
7
)
Hardystonite
Ca
 
2
Zn(Si
 
2
O
 
7
)
Okayamalite
Ca
 
2
B(BSiO
 
7
)
Related Minerals - Nickel-Strunz Grouping):

- +
9.BB.10Åkermanite
Ca
 
2
Mg(Si
 
2
O
 
7
)
9.BB.10Cebollite
Ca
 
5
Al
 
2
(SiO
 
4
)
 
3
(OH)
 
4
9.BB.10Gehlenite
Ca
 
2
Al(AlSiO
 
7
)
9.BB.10Gugiaite
Ca
 
2
Be(Si
 
2
O
 
7
)
9.BB.10Hardystonite
Ca
 
2
Zn(Si
 
2
O
 
7
)
9.BB.10Jeffreyite
(Ca,Na)
 
2
(Be,Al)(Si
 
2
O
 
7
,HSi
 
2
O
 
7
)
9.BB.10Okayamalite
Ca
 
2
B(BSiO
 
7
)
9.BB.15Barylite
Be
 
2
Ba(Si
 
2
O
 
7
)
9.BB.15Clinobarylite
Be
 
2
Ba(Si
 
2
O
 
7
)
9.BB.20Andrémeyerite
Fe
2+
2
Ba(Si
 
2
O
 
7
)

Other Names for Alumoåkermanite

Synonyms:
IMA2008-049Soda-Melilite
Other Languages:
German:Alumoåkermanit
Natriummelilith
Soda-Melilith

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 Alumoåkermanite

Reference List:

- +
Louisnathan, J. (1970): The crystal structure of synthetic soda melilite, CaNaAISi207, Zeitschrift für Kristallographie, Vol. 131, p. 314 - 321

Fitton, G.J., Hughes D.J. (1981): Strontian melilite in a nephelinite lava from Etinde, Cameroon, Mineralogical Magazine, Vol. 44, pp. 261-264

Bindi, L., Bonazzi, P., Fitton, G.J. (2001): Crystal chemistry of strontian soda melilite from nephelinite lava of Mt. Etinde, Cameroon, European Journal of Mineralogy; February 2001; Vol. 13; p. 121-125

Wiedenmann, D., Zaitsev A.N., Britvin S.N., Krivovichev, S.V., Keller, J. (2009): Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine, 73, 373-384.

Internet Links for Alumoåkermanite

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    • Localities for Alumoåkermanite

    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.
    Cameroon
     
    • South-West Region
      • Buea
        • Cameroon Mt.
    		Fitton, G.J., Hughes D.J. (1981): Strontian melilite in a nephelinite lava from Etinde, Cameroon, Mineralogical Magazine, Vol. 44, pp. 261-264
    Russia
     
    • Eastern-Siberian Region
      • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
        • Maimecha and Kotui Rivers Basin
    		Pavel M. Kartashov data
    Tanzania
     
    • Arusha Region
    		IMA website - Dec.2008 approvals
    Mineral and/or Locality
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