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UM1990-21-F:AlCaHMgNa

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Formula:
(Na,Ca)2(Mg,Al)2F6(OH,O,F)
ideal author's formula: Na2Mg2(F,OH)6.H2O
Specific Gravity:
3.06 (Calculated)
Crystal System:
Isometric
Possibly related to hydrokenoralstonite, and chemically somewhat resembling UM1941-01-F:AlCaHMgNa.

As octahedral crystals, up to 2 mm in size; associated with morinite, gearksutite, alkali feldspar, siderite, and vivianite, sitting on quartz and fluorite.


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Classification of UM1990-21-F:AlCaHMgNaHide

Notes:
Unnamed (probably valid)

Physical Properties of UM1990-21-F:AlCaHMgNaHide

Density:
3.06 g/cm3 (Calculated)

Chemical Properties of UM1990-21-F:AlCaHMgNaHide

Formula:
(Na,Ca)2(Mg,Al)2F6(OH,O,F)

ideal author's formula: Na2Mg2(F,OH)6.H2O

Crystallography of UM1990-21-F:AlCaHMgNaHide

Crystal System:
Isometric
Cell Parameters:
a = 10.081(3) Å
Unit Cell V:
1,024.50 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.906(10)
2.314(50)
1.940(20)
1.783(60)
1.524(50)
Comments:
strong disorder and possible microdomains

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for UM1990-21-F:AlCaHMgNaHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Birch, W.D., Pring, A. (1990) A calcian ralstonite-like mineral from the Cleveland Mine, Tasmania, Australia. Mineral. Mag.: 54: 599-602; in: Jambor, J.L., Grew, E.S (1992): New mineral Names. American Mineralogist: 77: 211
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se (2016)

Internet Links for UM1990-21-F:AlCaHMgNaHide

Localities for UM1990-21-F:AlCaHMgNaHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Tasmania
    • Waratah-Wynyard municipality
      • Heazlewood district
        • Luina
Birch, W.D., Pring, A. (1990) A calcian ralstonite-like mineral from the Cleveland Mine, Tasmania, Australia. Mineral. Mag.: 54: 599-602; in: Jambor, J.L., Grew, E.S (1992): New mineral Names. American Mineralogist: 77: 211
 
Mineral and/or Locality  
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