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Sanrománite

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Formula:
Na2CaPb3[CO3]5
System:
Hexagonal
Colour:
colourless, green-yellow
Name:
Named for the Chilean naturalist (mineralogy and geology) Francisco J. San Román (1834-1902)

Classification of Sanrománite

Approved 2006
5/B.05-115
5.AC.30

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

14 : ANHYDROUS NORMAL CARBONATES
4 : Miscellaneous
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http://www.mindat.org/min-29029.html
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Type Occurrence of Sanrománite

General Appearance of Type Material:
radiating acicular or artichoke-like aggregates, and as isolated needles

Physical Properties of Sanrománite

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

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 Data:
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:
Na2CaPb3[CO3]5
All elements listed in formula:
Analytical Data:
Na2O (6.04)
CaO (5.64)
PbO (65.86)
CO2 (21.84)
total (99.38)

Relationship of Sanrománite to other Species

5.AC.05EiteliteNa2Mg(CO3)2
5.AC.10NyerereiteNa2Ca(CO3)2
5.AC.10ZemkoriteNa2Ca(CO3)2
5.AC.15BütschliiteK2Ca(CO3)2
5.AC.20FairchilditeK2Ca(CO3)2
5.AC.25ShortiteNa2Ca2(CO3)3
5.AC.30Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
5.AC.30CalcioburbankiteNa3(Ca,REE,Sr)3(CO3)5
5.AC.30Khanneshite(Na,Ca)3(Ba,Sr,Ce,Ca)3(CO3)5

Other Names for Sanrománite

Name in Other Languages:
German:Sanromanit

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 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

Localities for Sanrománite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
 
  • Tarapacá Region
    • Iquique Province
      • Santa Rosa-Huantajaya District
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