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UM1973-06-CO:MgH
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Formula:
Mg5(CO3)4(OH)2 · 8H2O
Colour:
Snow-white to gray
Higher hydrate counterpart of dypingite, giorgiosite, and hydromagnesite.
Compare also artinite, so-called shelkovite, and 'UM1987-01-CO:HMgS'.
Possibly identical to dypingite, but differs in optical properties.
Forms oolitic, botryoidal, or reniform aggregates, with artinite, chrysotile, hydromagnesite, brugnatellite, nesquehonite, and pyroaurite, on weathered surface of a brucite-containing serpentinite, at Yoshikawa, Aichi Prefecture, Japan. Very fine-grained.
Compare also artinite, so-called shelkovite, and 'UM1987-01-CO:HMgS'.
Possibly identical to dypingite, but differs in optical properties.
Forms oolitic, botryoidal, or reniform aggregates, with artinite, chrysotile, hydromagnesite, brugnatellite, nesquehonite, and pyroaurite, on weathered surface of a brucite-containing serpentinite, at Yoshikawa, Aichi Prefecture, Japan. Very fine-grained.
Unique Identifiers
Mindat ID:
47305
Long-form identifier:
mindat:1:1:47305:3
Physical Properties of UM1973-06-CO:MgH
Colour:
Snow-white to gray
Chemistry of UM1973-06-CO:MgH
Mindat Formula:
Mg5(CO3)4(OH)2 · 8H2O
Element Weights:
Elements listed:
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 33.2 Ã | (62) |
| 16.36 Ã | (33) |
| 10.82 Ã | (55) |
| 6.454 Ã | (55) |
| 5.887 Ã | (100) |
| 4.206 Ã | (38) |
| 2.933 Ã | (57) |
Comments:
6.454: plus nesquehonite; similar to hydromagnesite after heating to 150oC
Other Information
IR Spectrum:
similar to hydromagnesite
Thermal Behaviour:
endothermic effects at 40, 114, 270, 410 and 5l5o;
DTA pattern above 150o is similar to that of hydromagnesite
DTA pattern above 150o is similar to that of hydromagnesite
Notes:
slightly water-soluble
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 UM1973-06-CO:MgH
mindat.org URL:
https://www.mindat.org/min-47305.html
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References for UM1973-06-CO:MgH
Reference List:
Localities for UM1973-06-CO:MgH
Showing 3 localities.
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Germany | |
| Gerhard MÃķhn collection |
| Gerhard MÃķhn collection |
Japan | |
| Suzuki et al. (1973) +1 other reference |
