UM1996-25-OH:AlCMg
Invalid as an unnamed mineral
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Colour:
bright orange-red
Crystal System:
Hexagonal
Polymorph of:
Seems to be a(nother) polytype of quintinite. Still crystallographically different from quintinite-2H and UM1987-05-OH:AlCMg.
As grains, 2-6 mm in diameter.
Structure details:
- a brucite-type layer [AlMg2(OH)6]
- a CO3 net
- a net of 3H2O
- the above units' sequence is 1–2–1–3–1
As grains, 2-6 mm in diameter.
Structure details:
- a brucite-type layer [AlMg2(OH)6]
- a CO3 net
- a net of 3H2O
- the above units' sequence is 1–2–1–3–1
Unique Identifiers
Mindat ID:
54065
Long-form identifier:
mindat:1:1:54065:6
Similar Names
| UM1987-05-OH:AlCMg | Mg4Al2(OH)12(CO3,SO4) · 3H2O |
IMA Classification of UM1996-25-OH:AlCMg
IMA status notes:
Unnamed (probably invalid)
Approval history:
status set to "invalid" as polytypes are unlikely to be currently accepted as separate mineral species
Physical Properties of UM1996-25-OH:AlCMg
Colour:
Bright orange-red
Crystallography of UM1996-25-OH:AlCMg
Crystal System:
Hexagonal
Class (H-M):
6m2 - Ditrigonal Dipyramidal
Space Group:
P62m
Setting:
P62m
Cell Parameters:
a = 5.283(3) Å, c = 15.150(9) Å
Ratio:
a:c = 1 : 2.868
Unit Cell V:
366.19 ų (Calculated from Unit Cell)
Comment:
symmetry lowered due to complete ordering
Other Information
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 UM1996-25-OH:AlCMg
mindat.org URL:
https://www.mindat.org/min-54065.html
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References for UM1996-25-OH:AlCMg
Reference List:
Localities for UM1996-25-OH:AlCMg
Showing 1 localities.
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The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Brazil | |
| Arakcheyeva et al. (1996) +1 other reference |
