Sapphirine-2M
A structural variant of Sapphirine
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Formula:
Mg4(Mg3Al9)O4[Si3Al9O36]
Crystal System:
Monoclinic
Unique Identifiers
Mindat ID:
39062
Long-form identifier:
mindat:1:1:39062:6
GUID
(UUID V4):
(UUID V4):
28ab19a8-269e-48a1-9dd5-2156cd25d7f2
Chemical Properties of Sapphirine-2M
Formula:
Mg4(Mg3Al9)O4[Si3Al9O36]
Elements listed:
Crystallography of Sapphirine-2M
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 11.27 Å, b = 14.4 Å, c = 9.93 Å
β = 125.5°
β = 125.5°
Ratio:
a:b:c = 0.783 : 1 : 0.69
Unit Cell V:
1312 ų
Z:
4
Comment:
Unit cell from Moore (1969), for 2M polytype
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.990 Ã… | (65) |
| 2.844 Ã… | (50) |
| 2.447 Ã… | (100) |
| 2.023 Ã… | (60) |
| 2.015 Ã… | (90) |
| 1.4353 Ã… | (65) |
| 1.4192 Ã… | (65) |
Comments:
Fiskenæsset, Greenland. The data are from Moore (1969). The data closely resemble those of surinamite.
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.
References for Sapphirine-2M
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Moore, P.B. (1969) The crystal structure of sapphirine. American Mineralogist: 54: 31-49.
Internet Links for Sapphirine-2M
mindat.org URL:
https://www.mindat.org/min-39062.html
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