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Sanrománite

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Formula:
Na
 
2
CaPb
 
3
[CO
 
3
]
 
5
System:HexagonalColour:colourless, green-yellow
Name:Named for the Chilean naturalist (mineralogy and geology) Francisco J. San Román (1834-1902)

Classification of Sanrománite

IMA status:Approved 2006
Strunz 8th edition ID:5/B.05-115
Strunz 9th edition ID:5.AD.10
Nickel-Strunz 10th (pending) edition ID:5.AC.30

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
C : Alkali and alkali-earth carbonates
Dana 8th edition ID:14.4.4.4

14 : ANHYDROUS NORMAL CARBONATES
4 : Miscellaneous
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Type Occurrence of Sanrománite

Type Locality:Santa Rosa Mine, Santa Rosa-Huantajaya District, Iquique Province, Tarapacá Region, Chile
General Appearance of Type Material:radiating acicular or artichoke-like aggregates, and as isolated needles

Physical Properties of Sanrománite

Colour:colourless, green-yellow
Density (calculated):5.2 g/cm3

Crystallography of Sanrománite

Crystal System:Hexagonal
Class (H-M):6mm - Dihexagonal Pyramidal
Space Group:P63mc
Cell Parameters:a = 10.553Å, c = 6.6441Å
Ratio:a:c = 1 : 0.63
Unit Cell Volume:V 640.5 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.769 (100)
3.323 (43)
3.066 (51)
2.688 (50)
2.640 (65)
2.161 (50)
2.066 (34)
1.993 (44)

Chemical Properties of Sanrománite

Formula:
Na
 
2
CaPb
 
3
[CO
 
3
]
 
5
Simplified for copy/paste:Na2CaPb3[CO3]5
All elements listed in formula:C, Ca, Na, O, Pb
Analytical Data:
Na2O (6.04)
CaO (5.64)
PbO (65.86)
CO2 (21.84)
total (99.38)

Relationship of Sanrománite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.AC.05Eitelite
Na
 
2
Mg(CO
 
3
)
 
2
5.AC.10Nyerereite
Na
 
2
Ca(CO
 
3
)
 
2
5.AC.10Zemkorite
Na
 
2
Ca(CO
 
3
)
 
2
5.AC.15Bütschliite
K
 
2
Ca(CO
 
3
)
 
2
5.AC.20Fairchildite
K
 
2
Ca(CO
 
3
)
 
2
5.AC.25Shortite
Na
 
2
Ca
 
2
(CO
 
3
)
 
3
5.AC.30Burbankite
(Na,Ca)
 
3
(Sr,Ba,Ce)
 
3
(CO
 
3
)
 
5
5.AC.30Calcioburbankite
Na
 
3
(Ca,REE,Sr)
 
3
(CO
 
3
)
 
5
5.AC.30Khanneshite
(Na,Ca)
 
3
(Ba,Sr,Ce,Ca)
 
3
(CO
 
3
)
 
5

Other Names for Sanrománite

Synonyms:
IMA2006-009Sanromanite
Other Languages:
German:Sanromanit

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Sanrománite

Reference List:

- +
Schlüter, J., T. Malcherek & D. Pohl (2007): "Sanrománite, from the Santa Rosa mine, Atacama desert, Chile, a new mineral of the burbankite group": Neues Jahrbuch fur Mineralogie, Abhandlungen, 183, 117-121.

Internet Links for Sanrománite

Search Engines:
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  • External Links:
  • Look for Sanrománite on Webmineral
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  • Look for Sanrománite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Find Sanrománite on www.crystalclassics.co.uk
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  • Localities for Sanrománite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Chile
     
    • Tarapacá Region
      • Iquique Province
        • Santa Rosa-Huantajaya District
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