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Biachellaite

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About BiachellaiteHide

Formula:
(Na,Ca,K)8(Al6Si6O24)(SO4)2(OH)0.5 · H2O
Colour:
colourless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.515 (Calculated)
Crystal System:
Trigonal
Name:
Named for type locality, Biachella Valley, Italy

Classification of BiachellaiteHide

Approved
Approval Year:
2007
8.FB.05

8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
B : Polyphosphates, etc., with OH only
76.2.9.19

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species

Physical Properties of BiachellaiteHide

Vitreous
Transparency:
Transparent
Colour:
colourless
Hardness:
Hardness Data:
Measured
Cleavage:
Perfect
perfect on {10-10}
Density:
2.515 g/cm3 (Calculated)

Chemical Properties of BiachellaiteHide

Formula:
(Na,Ca,K)8(Al6Si6O24)(SO4)2(OH)0.5 · H2O
IMA Formula:
(Na,Ca,K)8(Si6Al6O24)(SO4)2(OH)0.5 · H2O

Crystallography of BiachellaiteHide

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 12.913 Å, c = 79.605 Å
Ratio:
a:c = 1 : 6.165
Unit Cell V:
11495 ų
Z:
15

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.07 (19)
6.45 (18)
4.782 (15)
3.720 (100)
3.576 (18)
3.469 (14)
3.300 (47)
3.220 (16)

Type Occurrence of BiachellaiteHide

General Appearance of Type Material:
equant dipyramidal crystals up to 1 cm in cavities
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia (catalogue no.3642/1)
Geological Setting of Type Material:
volcanic ejectum
Associated Minerals at Type Locality:

Synonyms of BiachellaiteHide

Relationship of Biachellaite to other SpeciesHide

Other Members of this group:
Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
Alloriite(Na,Ca,K)26Ca4(Al6Si6O24)4(SO4)6Cl6Trig. 3m : P3 1c
Balliranoite(Na,K)6Ca2(Si6Al6O24)Cl2(CO3)Hex. 6 : P63
Bystrite(Na,K)7Ca(Al6Si6O24)(S5)ClHex.
Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2OHex. 6 : P63
CancrisiliteNa7(Al5Si7O24)(CO3) · 3H2OHex.
Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
DepmeieriteNa8(Al6Si6O24)(PO4,CO3)1-x · 3H2O (x<0.5)Hex. 6 : P63
Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Hex.
HydroxycancriniteNa8(Al6Si6O24)(OH)2 · 2H2OHex.
KircheriteNa5Ca2K(Al6Si6O24)(SO4)2 · 0.33H2OTrig. 3 2 : R3 2
KyanoxaliteNa7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5)Hex. 6 : P63
Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex.
Marinellite(Na,K)42Ca6(Al6Si6O24)6(SO4)8Cl2 · 3H2OTrig. 3m : P3 1c
MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
Quadridavyne(Na,K)6Ca2(Al6Si6O24)Cl4Hex.
Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2OHex.
SulfhydrylbystriteNa5K2Ca[Al6Si6O24](S5)2(SH)Trig. 3m : P3 1c
Tounkite(Na,Ca,K)8(Al6Si6O24)(SO4)2Cl · H2OHex.
Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63

Related Minerals - Dana Grouping (8th Ed.)Hide

76.2.9.20Fantappièite[Na82.5Ca33K16.5](Si99Al99O396)(SO4)33 · 4H2OTrig. 3 : R3
76.2.9.21KyanoxaliteNa7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5)Hex. 6 : P63
76.2.9.21IMA2008-041Na7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5)
76.2.9.22Balliranoite(Na,K)6Ca2(Si6Al6O24)Cl2(CO3)Hex. 6 : P63
76.2.9.24DepmeieriteNa8(Al6Si6O24)(PO4,CO3)1-x · 3H2O (x<0.5)Hex. 6 : P63
76.2.9.26KircheriteNa5Ca2K(Al6Si6O24)(SO4)2 · 0.33H2OTrig. 3 2 : R3 2

Other InformationHide

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 BiachellaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
N. V. Chukanov, R. K, Rastsvetaeva, I. V. Pekov, A. E. Zadov, R. Allori, N. V. Subkova, G. Giester, D. Yu. Pushcharovky & K. V. Van (2008): Biachellaite (Na,Ca,K)8(Si6Al6O24)(SO4)2(OH)0.5.H2O, a new mineral of the cancrinite group. Proceedings of the Russian Mineralogical Society, 137(3), 57–66 (in Russian with English abstract).

Internet Links for BiachellaiteHide

Localities for BiachellaiteHide

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)
 
  • Latium
    • Rome Province
      • Sacrofano Caldera
        • Sacrofano
Chukanov, N.V., et al., ZRMO 137(3),57-66(2008)
Mineral and/or Locality  
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