Sanrománite
A valid IMA mineral species
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About Sanrománite
Francisco J. San Román
Formula:
Na2CaPb3[CO3]5
Colour:
Colourless, green-yellow
Lustre:
Vitreous
Specific Gravity:
5.20 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
Named for the Chilean naturalist (mineralogy and geology) Francisco J. San Román (ca. 1838, Copiapó, Chile - 1902, Santiago de Chile, Chile). He explored and surveyed the Atacama Desert, participating in eight campaigns financed by the Chilean state from 1883 to 1887 and then continued on his own to explore and search for mining veins. In 1890, he drew up and published the first topographic map of the Atacama Desert and mountain ranges. Delegate of Chile to the 5th International Congress of Geology that was held in Washington in 1890.
Name Encoding
ASCII-7:
Sanromanite
Unique Identifiers
Mindat ID:
29029
Long-form identifier:
mindat:1:1:29029:2
IMA Classification of Sanrománite
Classification of Sanrománite
5.AC.30
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
C : Alkali and alkali-earth carbonates
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
14 : ANHYDROUS NORMAL CARBONATES
4 : Miscellaneous
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Srm | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Sanrománite
Vitreous
Transparency:
Transparent
Colour:
Colourless, green-yellow
Streak:
White
Tenacity:
Brittle
Cleavage:
None Observed
Density:
5.20 g/cm3 (Calculated)
Chemistry of Sanrománite
Mindat Formula:
Na2CaPb3[CO3]5
Element Weights:
Crystallography of Sanrománite
Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Cell Parameters:
a = 10.553(1) Å, c = 6.641(1) Å
Ratio:
a:c = 1 : 0.629
Unit Cell V:
640.5 ų
Z:
2
Morphology:
Crystals are elongated along [0001] and show the forms {1010} and {1121}.
Twinning:
Occurs on (1120).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.769 Å | (100) |
| 3.323 Å | (43) |
| 3.066 Å | (51) |
| 2.688 Å | (50) |
| 2.640 Å | (65) |
| 2.161 Å | (50) |
| 2.066 Å | (34) |
| 1.993 Å | (44) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Sanrománite
General Appearance of Type Material:
Radiating acicular or artichoke-like aggregates, and as isolated needles.
Place of Conservation of Type Material:
Mineralogisches Museum, Universität Hamburg, Hamburg, Germany, numbers MD 211, MD 209, C 904.
Geological Setting of Type Material:
Oxidation zone of a polymetallic vein deposit.
Associated Minerals at Type Locality:
Synonyms of Sanrománite
Other Language Names for Sanrománite
Dutch:Sanromániet
German:Sanrománit
Sanromanit
Sanromanit
Relationship of Sanrománite to other Species
Member of:
Other Members of Burbankite Group:
| Burbankite | (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 | Hex. 6mm : P63mc |
| Calcioburbankite | Na3(Ca,REE,Sr)3(CO3)5 | Hex. 6mm : P63mc |
| Khanneshite | (Na,Ca)3(Ba,Sr,Ce,Ca)3(CO3)5 | Hex. 6mm : P63mc |
| Lishiite | (Ca2◻)Sr3(CO3)5 | Hex. 6mm : P63mc |
| Petersenite-(Ce) | Na4(Ce,La,Nd)2(CO3)5 | Mon. 2 : P21 |
| Rémondite-(Ce) | Na3(Ce,Ca,Na)3(CO3)5 | Mon. 2 : P21 |
| Rémondite-(La) | Na3(La,Ca,Na)3(CO3)5 | Mon. 2 : P21 |
Common Associates
Associations Based on Photo Data:
| 12 photos of Sanrománite associated with Juangodoyite | Na2Cu(CO3)2 |
| 8 photos of Sanrománite associated with Malachite | Cu2(CO3)(OH)2 |
| 3 photos of Sanrománite associated with Chalconatronite | Na2Cu(CO3)2 · 3H2O |
| 3 photos of Sanrománite associated with Calcite | CaCO3 |
| 1 photo of Sanrománite associated with Abellaite | NaPb2(CO3)2(OH) |
| 1 photo of Sanrománite associated with Trona | Na3H(CO3)2 · 2H2O |
| 1 photo of Sanrománite associated with Nahcolite | NaHCO3 |
Related Minerals - Strunz-mindat Grouping
| 5.AC.05 | Eitelite | Na2Mg(CO3)2 |
| 5.AC.10 | Zemkorite | Na2Ca(CO3)2 |
| 5.AC.10 | Nyerereite | Na2Ca(CO3)2 |
| 5.AC.15 | Bütschliite | K2Ca(CO3)2 |
| 5.AC.20 | Fairchildite | K2Ca(CO3)2 |
| 5.AC.25 | Shortite | Na2Ca2(CO3)3 |
| 5.AC.30 | Burbankite | (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 |
| 5.AC.30 | Calcioburbankite | Na3(Ca,REE,Sr)3(CO3)5 |
| 5.AC.30 | Khanneshite | (Na,Ca)3(Ba,Sr,Ce,Ca)3(CO3)5 |
| 5.AC.30 | Lishiite | (Ca2◻)Sr3(CO3)5 |
Fluorescence of Sanrománite
Not fluorecent.
Other Information
Notes:
Easily soluble in concentrated HCl with strong effervescence. It decomposes slowly in concentrated nitric and sulphuric acids leading to respectively a white and a bluish-white residue.
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 Sanrománite
mindat.org URL:
https://www.mindat.org/min-29029.html
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References for Sanrománite
Localities for Sanrománite
Showing 3 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.
Chile | |
| www.mindat.org (n.d.) |
| Schlüter et al. (2007) |
Spain | |
| Joan Rosell (June,2016) |
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Santa Rosa Mine, Santa Rosa-Huantajaya mining district, Iquique Province, Tarapacá, Chile