Campostriniite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Campostriniite
Italo Campostrini
Formula:
(Bi3+,Na)3(NH4,K)2Na2(SO4)6 · H2O
Formula from the IMA proposal: (Bi,Na)3(Na,K)4(SO4)6·H2O
Colour:
White
Lustre:
Vitreous
Specific Gravity:
3.87 (Calculated)
Crystal System:
Monoclinic
Name:
Named in 2013 by F. Demartin, C. Castellano, and C.M. Gramaccioli in honor of Italo Campostrini (b. 1959), a very active mineralogist, especially in the study of volcanic sublimates, at the University of Milan.
Type Locality:
Isostructural with:
Unique combination of elements (NH4-Bi-Na). The second NH4-Bi mineral after argesite.
Structure details: (1) two independent [9](Bi,Na) sites; (2) single [8]Na site; (3) single [8](NH4,K) site; (4) 3 independent sulfate groups; (5) Bi-coordinated water molecule.
Structure details: (1) two independent [9](Bi,Na) sites; (2) single [8]Na site; (3) single [8](NH4,K) site; (4) 3 independent sulfate groups; (5) Bi-coordinated water molecule.
Unique Identifiers
Mindat ID:
45996
Long-form identifier:
mindat:1:1:45996:5
IMA Classification of Campostriniite
Approved
IMA Formula:
(Bi3+2.5Na0.5)(N3-H4)2Na2(S6+O4)6·H2O
Approval year:
2013
First published:
2015
Classification of Campostriniite
7.CD.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
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 |
|---|---|---|
| Cps | 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 Campostriniite
Vitreous
Colour:
White
Streak:
White
Cleavage:
None Observed
Fracture:
None observed
Density:
3.87 g/cm3 (Calculated)
Comment:
Couldn't be measured
Optical Data of Campostriniite
Type:
Biaxial
RI values:
n = >1.68
Max. Birefringence:
δ = 0.000
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Comments:
sign undetermined
Chemistry of Campostriniite
Mindat Formula:
(Bi3+,Na)3(NH4,K)2Na2(SO4)6 · H2O
Formula from the IMA proposal: (Bi,Na)3(Na,K)4(SO4)6·H2O
Formula from the IMA proposal: (Bi,Na)3(Na,K)4(SO4)6·H2O
Element Weights:
Common Impurities:
K
Crystallography of Campostriniite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 17.748(3) Å, b = 6.982(1) Å, c = 18.221(3) Å
β = 113.97(1)°
β = 113.97(1)°
Ratio:
a:b:c = 2.542 : 1 : 2.61
Unit Cell V:
2063 ų
Z:
4
Morphology:
Prismatic crystals up to 0.2 mm long.
Twinning:
Not observed
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.396 Å | (100) |
| 5.677 Å | (55) |
| 4.410 Å | (47) |
| 3.380 Å | (57) |
| 3.166 Å | (50) |
| 3.048 Å | (75) |
| 2.766 Å | (60) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Campostriniite
General Appearance of Type Material:
Prisms, up to 0.2 mm; most common forms: {20_1} , {_221} , {102}, {112}
Place of Conservation of Type Material:
Type material is deposited in the Reference Collection of the Dipartimento di Chimica, University of Milan, Milan, Italy, sample number 2013-03
Geological Setting of Type Material:
An active fumarole - fumarole FA, temperature ~350°C; occurs on a pyroclastic breccia
Associated Minerals at Type Locality:
Synonyms of Campostriniite
Other Language Names for Campostriniite
Dutch:Campostriniiet
German:Campostriniit
Related Minerals - Strunz-mindat Grouping
| 7.CD. | Argesite | (NH4)7Bi3Cl16 |
| 7.CD.05 | Matteuccite | NaHSO4 · H2O |
| 7.CD.10 | Mirabilite | Na2SO4 · 10H2O |
| 7.CD.15 | Lecontite | (NH4)Na(SO4) · 2H2O |
| 7.CD.20 | Hydroglauberite | Na10Ca3(SO4)8 · 6H2O |
| 7.CD.25 | Eugsterite | Na4Ca(SO4)3 · 2H2O |
| 7.CD.30 | Görgeyite | K2Ca5(SO4)6 · H2O |
| 7.CD.35 | Syngenite | K2Ca(SO4)2 · H2O |
| 7.CD.35 | Antofagastaite | Na2Ca(SO4)2 · 1.5H2O |
| 7.CD.35 | Koktaite | (NH4)2Ca(SO4)2 · H2O |
| 7.CD.40 | Gypsum | CaSO4 · 2H2O |
| 7.CD.45 | Chinleite-(Y) | NaY(SO4)2 · H2O |
| 7.CD.45 | Bassanite | Ca(SO4) · 0.5H2O |
| 7.CD.45 | Chinleite-(Nd) | NaNd(SO4)2 · H2O |
| 7.CD.45 | Chinleite-(Ce) | NaCe(SO4)2(H2O) |
| 7.CD.50 | Zircosulfate | (Zr,Ti)(SO4)2 · 4H2O |
| 7.CD.55 | Schieffelinite | Pb10Te6+6O20(OH)14(SO4)(H2O)5 |
| 7.CD.60 | Montanite | Bi2(TeO6) · nH2O |
| 7.CD.65 | Omongwaite | Na2Ca5(SO4)6 · 3H2O |
Fluorescence of Campostriniite
non-fluorescent
Other Information
IR Spectrum:
[cm-1]: 3071 and 1418 (NH4 ion); additional bands from sulfate and water absorption
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 Campostriniite
mindat.org URL:
https://www.mindat.org/min-45996.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Campostriniite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No 18. Mineralogical Magazine, 77 (8) 3249-3258 doi:10.1180/minmag.2013.077.8.15
Demartin, Francesco, Castellano, Carlo, Gramaccioli, Carlo Maria (2015) Campostriniite, (Bi3+,Na)3(NH4,K)2Na2(SO4)6·H2O, a new sulfate isostructural with görgeyite, from La Fossa Crater, Vulcano, Aeolian Islands, Italy. Mineralogical Magazine, 79 (4) 1007-1018 doi:10.1180/minmag.2015.079.4.10
Localities for Campostriniite
Showing 1 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.
Italy (TL) | |
| Williams et al. (2013) +1 other reference |
Quick NavTopAbout CampostriniiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
La Fossa crater, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy