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Natromontebrasite
A discredited species name
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About Natromontebrasite
Colour:
Usually white, also pale yellow, pink, pale green
Lustre:
Sub-Vitreous, Resinous, Waxy, Dull
Hardness:
5½ - 6
Specific Gravity:
3.085
Crystal System:
Triclinic
Name:
Named in 1911 by Waldemar T. Schaller for the chemical composition: Natro- (sodian) and for the mineral's similarity to montebrasite. discredited as a mixture in 2007 by Andre M. Fransolet, F. Fontan, and Ph. de Parseval.
Discredited as a "mixture of an OH-rich amblygonite and lacroixite, with subordinate amounts of wardite" (Fransolet et al., 2007).
Unique Identifiers
Mindat ID:
2857
Long-form identifier:
mindat:1:1:2857:4
IMA Classification of Natromontebrasite
Discredited
Classification of Natromontebrasite
41.5.8.3
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
Physical Properties of Natromontebrasite
Sub-Vitreous, Resinous, Waxy, Dull
Transparency:
Translucent
Colour:
Usually white, also pale yellow, pink, pale green
Streak:
White
Hardness:
5½ - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {100}, good on {110}, distinct on {011}, and on {001}, imperfect. (Frequently fine-grained)
Perfect on {100}, good on {110}, distinct on {011}, and on {001}, imperfect. (Frequently fine-grained)
Fracture:
Irregular/Uneven
Density:
3.085 g/cm3 (Measured)
Crystallography of Natromontebrasite
Crystal System:
Triclinic
Synonyms of Natromontebrasite
Other Language Names for Natromontebrasite
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 Natromontebrasite
mindat.org URL:
https://www.mindat.org/min-2857.html
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References for Natromontebrasite
Reference List:
Schaller (1911) Natramblygonite, a New Mineral. American Journal of Science: 31: 48.(as Natramblygonite)
Schaller, W. T. (1911) Natronamblygonit, ein neues Mineral. Zeitschrift für Kristallographie, 49 (1-6). 233-235 doi:10.1524/zkri.1911.49.1.233as Natronamblygonit(
Localities for Natromontebrasite
Showing 11 localities.
symbol to view information about a locality.
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.
China | |
| Yueqing Yang et al. (1987) |
Portugal | |
| Neiva et al. (2001) |
| Neiva et al. (2001) |
Rwanda | |
| Gallagher et al. (1963) +1 other reference |
| Handbook of Mineralogy (http://www.handbookofmineralogy.org/pdfs/lacroixite.pdf) | |
UK | |
| |
USA | |
| Palache et al. (1951) +1 other reference |
| Eckel et al. (1997) | |
| Eckel et al. (1997) +1 other reference | |
| Schooner (circa 1985) +1 other reference |
| King et al. (1994) |
Eight Mile Park, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA