UM1969-12-SiO:AlFeHK
A material that is NOT an approved mineral species
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Formula:
(Na,Ca,K)(Fe,Mg)Al2Si4O13 · 2H2O
Colour:
light gray to bluish-greenish-gray
Reported as "unnamed gray minerals". Possibly a zeolite. Widely distributed in ussingite veins cutting naujaite at Mt. Nakalak, Greenland, where it fills cavities in druses of ussingite, natrolite, and analcime. Also from Lovozero massif, where it occurs in hydrothermally altered foyaites, juvites, and malignites.
Chemically similar is naujakasite, although it does not contain water.
Chemically similar is naujakasite, although it does not contain water.
Unique Identifiers
Mindat ID:
47183
Long-form identifier:
mindat:1:1:47183:3
GUID
(UUID V4):
(UUID V4):
4e20a171-d2a7-48ab-bfa0-0731d3756f47
Physical Properties of UM1969-12-SiO:AlFeHK
Colour:
light gray to bluish-greenish-gray
Fracture:
Conchoidal
Optical Data of UM1969-12-SiO:AlFeHK
Type:
Isotropic
RI values:
n = ~1.55
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Moderate
Comments:
isotropic or showing weak aggregate polarization
Chemical Properties of UM1969-12-SiO:AlFeHK
Formula:
(Na,Ca,K)(Fe,Mg)Al2Si4O13 · 2H2O
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
6.50 Å | (90) |
5.85 Å | (60) |
4.38 Å | (70) |
2.99 Å | (100) |
2.84 Å | (80) |
2.71 Å | (50) |
1.799 Å | (70) |
Other Information
IR Spectrum:
indicates some crystallinity
Thermal Behaviour:
endothermic breaks (~1000 and 350oC); gradual water loss from 20-500oC; melts at 1150oC
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 UM1969-12-SiO:AlFeHK
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Semenov, E.I. (1969): Mineralogy of the Ilimaussaq Alkaline Massif, southern Greenland. Inst. Mineral., Geokhim., Kristallokhim. Redk. Elementov, Izdat. "Nauka": 106-110 [in Russian]; in: Fleischer, M. (1970): New mineral names. American Mineralogist: 55: 2135-2139
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/Valid2009_03.pdf (2016)
Internet Links for UM1969-12-SiO:AlFeHK
mindat.org URL:
https://www.mindat.org/min-47183.html
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Localities for UM1969-12-SiO:AlFeHK
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).
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.
All localities listed without proper references should be considered as questionable.
Greenland | |
| Semenov, E.I. (1969): Mineralogy of the Ilimaussaq Alkaline Massif, southern Greenland. Inst. Mineral., Geokhim., Kristallokhim. Redk. Elementov, Izdat. "Nauka": 106-110 [in Russian]; in: Fleischer, M. (1970): New mineral names. American Mineralogist: 55: 2135-2139 |
Russia | |
| Semenov, E.I. (1969): Mineralogy of the Ilimaussaq Alkaline Massif, southern Greenland. Inst. Mineral., Geokhim., Kristallokhim. Redk. Elementov, Izdat. "Nauka": 106-110 [in Russian]; in: Fleischer, M. (1970): New mineral names. American Mineralogist: 55: 2135-2139 |