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IMA2008-049

Big Photo

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

Show IMA2008-049 Photos (2)
Formula:
(Ca,Na)
 
2
(Al,Mg,Fe
2+
 
)(Si
 
2
O
 
7
)
System:Tetragonal


Melilite group

Classification of IMA2008-049

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 IMA2008-049

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

Crystallography of IMA2008-049

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)

Chemical Properties of IMA2008-049

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

Relationship of IMA2008-049 to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BB.10Åkermanite
Ca
 
2
Mg[Si
 
2
O
 
7
]
9.BB.10Cebollite
Ca
 
5
Al
 
2
Si
 
3
O
 
12
(OH)
 
4
 or near
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
 
6
(O,OH)]
9.BB.10Okayamalite
Ca
 
2
B[BSiO
 
7
]
9.BB.15Barylite
BaBe
 
2
[Si
 
2
O
 
7
]
9.BB.15Clinobarylite
BaBe
 
2
Si
 
2
O
 
7
9.BB.20Andrémeyerite
BaFe
2+
2
[Si
 
2
O
 
7
]

Other Names for IMA2008-049

Synonyms:
Soda-Melilite
Other Languages:
German: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 IMA2008-049

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

IMA website - Approvals Dec. 2008

Internet Links for IMA2008-049

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    Localities for IMA2008-049

    Hide Locality List
    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.
    (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
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
            • Bellerberg volcano
              • Southern lava flow
                • Mayener Feld
    		in the collection of C.&H. Schäfer
    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
    Google
     
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