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Unnamed (Pb-Al-Mn Silicate-Sulphate)

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Formula:
Pb
 
27
(Al
 
1.6
Mn
 
0.4
)(Si
 
6
O
 
15
)
 
2
(SO
 
4
)
 
2
O
 
10
(OH)
 
24
System:Hexagonal


Round masses, consisting of white, platy crystals.
Occurs within cavities in weathered rock fragments that are debris from a sphalerite-chalcopyrite-galena skarn deposit.

Classification of Unnamed (Pb-Al-Mn Silicate-Sulphate)

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Crystallography of Unnamed (Pb-Al-Mn Silicate-Sulphate)

Crystal System:Hexagonal
Cell Parameters:a = 9.203(4) Å, c = 25.72(2) Å
Ratio:a:c = 1 : 2.795
Unit Cell Volume:V 1,886.52 ų (Calculated from Unit Cell)
Comment:Class or space group unknown.
X-Ray Powder Diffraction:
d-spacingIntensity
25.7 (70)
3.20 (80)
2.86 (100)
1.95 (40)
1.92 (35)
1.87 (80)

Chemical Properties of Unnamed (Pb-Al-Mn Silicate-Sulphate)

Formula:
Pb
 
27
(Al
 
1.6
Mn
 
0.4
)(Si
 
6
O
 
15
)
 
2
(SO
 
4
)
 
2
O
 
10
(OH)
 
24
Essential elements:Al, H, Mn, O, Pb, S, Si
All elements listed in formula:Al, H, Mn, O, Pb, S, Si

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 Unnamed (Pb-Al-Mn Silicate-Sulphate)

Reference List:

- +
Cipriani, C., Corazza, M. & Pratesi, G. (1995): A new lead silicate sulfate hydroxide from Val Fucinaia, Tuscany, Italy. Periodico di Mineralogia, Roma, 309-313. [http://www.minsocam.org/msa/ammin/toc/abstracts/1997_abstracts/ja97_abstracts/Jambor_p820_97.pdf]

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    • Localities for Unnamed (Pb-Al-Mn Silicate-Sulphate)

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    (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.
    Italy
     
    • Tuscany
      • Livorno Province
    		Cipriani, C., Corazza, M. & Pratesi, G. (1995): A new lead silicate sulfate hydroxide from Val Fucinaia, Tuscany, Italy. Periodico di Mineralogia, Roma, 309-313.
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