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UM1990-59-SiO:AlBCHMg

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Formula:
Ca24Mg8(BO3)13Al0.75Si3(O,OH)12(CO3)8 · 8H2O
author's formula: 2 Ca24Mg8(BO3)8{(BO3)y[AlSi4(O,OH)<16]x}(CO3)8.<8H2O (x=0.73, y=5.0)
Crystal System:
Isometric
Chemically similar to harkerite and sakhaite. Reported as a sakhaite-like mineral.


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Unique IdentifiersHide

Mindat ID:
51744
Long-form identifier:
mindat:1:1:51744:5

Chemistry of UM1990-59-SiO:AlBCHMgHide

Mindat Formula:
Ca24Mg8(BO3)13Al0.75Si3(O,OH)12(CO3)8 · 8H2O

author's formula: 2 Ca24Mg8(BO3)8{(BO3)y[AlSi4(O,OH)<16]x}(CO3)8.<8H2O (x=0.73, y=5.0)
Element Weights:
Element% weight
O46.734 %
Ca33.851 %
Mg6.843 %
B4.946 %
C3.382 %
Si2.965 %
Al0.712 %
H0.568 %

Calculated from ideal end-member formula.
Elements listed:
Al, B, C, Ca, H, Mg, O, Si - search for minerals with similar chemistry

Crystallography of UM1990-59-SiO:AlBCHMgHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Setting:
Fd3m

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.

Internet Links for UM1990-59-SiO:AlBCHMgHide

References for UM1990-59-SiO:AlBCHMgHide

Localities for UM1990-59-SiO:AlBCHMgHide

Showing 1 localities.

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.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Namibia
 
  • Otjozondjupa Region
    • Otavi Constituency
      • Kombat
Dunn et al. (1990) +1 other reference
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