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Campostriniite

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About CampostriniiteHide

00802510014949439464359.jpg
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.
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.


Classification of CampostriniiteHide

Approved
Approval Year:
2013
First Published:
2015
7.CD.

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations

Physical Properties of CampostriniiteHide

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 CampostriniiteHide

Type:
Biaxial
RI values:
n = >1.68
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Comments:
sign undetermined

Chemical Properties of CampostriniiteHide

Formula:
(Bi3+,Na)3(NH4,K)2Na2(SO4)6·H2O

Formula from the IMA proposal: (Bi,Na)3(Na,K)4(SO4)6·H2O
IMA Formula:
(Bi2.5Na0.5)(NH4)2Na2(SO4)6 · H2O
Common Impurities:
K

Crystallography of CampostriniiteHide

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)°
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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.396Å(100)
5.677Å(55)
4.410Å(47)
3.380Å(57)
3.166Å(50)
3.048Å(75)
2.766Å(60)
Comments:
From Type Description.

Type Occurrence of CampostriniiteHide

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 CampostriniiteHide

Related Minerals - Nickel-Strunz GroupingHide

7.CD.Argesite(NH4)7Bi3Cl16Trig. 3m (3 2/m) : R3c
7.CD.05MatteucciteNaHSO4 · H2OMon.
7.CD.10MirabiliteNa2SO4 · 10H2OMon. 2/m
7.CD.15Lecontite(NH4,K)NaSO4 · 2H2OOrth. 2 2 2 : P21 21 21
7.CD.20HydroglauberiteNa10Ca3(SO4)8 · 6H2OMon.
7.CD.25EugsteriteNa4Ca(SO4)3 · 2H2OMon.
7.CD.30GörgeyiteK2Ca5(SO4)6 · H2OMon.
7.CD.35Koktaite(NH4)2Ca(SO4)2 · H2OMon.
7.CD.35SyngeniteK2Ca(SO4)2 · H2OMon. 2/m : P21/m
7.CD.40GypsumCaSO4 · 2H2OMon. 2/m
7.CD.45BassaniteCa(SO4) · 0.5H2OMon. 2 : B2
7.CD.50Zircosulfate(Zr,Ti)(SO4)2 · 4H2OOrth.
7.CD.55SchieffelinitePb10Te6+6O20(OH)14(SO4)(H2O)5Orth. mmm (2/m 2/m 2/m) : Cmcm
7.CD.60MontaniteBi2(TeO6) · 2H2O
7.CD.65OmongwaiteNa2Ca5(SO4)6 · 3H2OMon. 2 : B2

Fluorescence of CampostriniiteHide

non-fluorescent

Other InformationHide

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.

References for CampostriniiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Demartin, F., Gramaccioli, C.M. and Castellano, C. (2013) Campostriniite, IMA 2013-086. CNMNC Newsletter No. 18, December 2013, page 3255; Mineralogical Magazine: 77: 3249-3258
Demartin, F., Castellano, C., Gramaccioli, C.M. (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: 1007-1018; in: Gagne, O.C., Belakovskiy, D.I., Cámara, F. (2016): New mineral names. American Mineralogist: 101: 1240-1243

Internet Links for CampostriniiteHide

Localities for CampostriniiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy (TL)
 
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
Demartin, F., Gramaccioli, C.M. and Castellano, C. (2013) Campostriniite, IMA 2013-086. CNMNC Newsletter No. 18, December 2013, page 3255; Mineralogical Magazine, 77, 3249-3258.; Demartin, F., Castellano, C., Gramaccioli, C.M. (2015): Campostriniite, (Bi^3+,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, 1007-1018
 
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