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Lucchesiite

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About LucchesiiteHide

Formula:
CaFe2+3 Al6(Si6O18)(BO3)3(OH)3O
Colour:
Black
Lustre:
Vitreous
Hardness:
7
Specific Gravity:
3.226 (Calculated)
Crystal System:
Trigonal
Name:
Named after Sergio Lucchesi (1958-2010), professor of mineralogy at Sapienza University of Rome (Italy), to honour his contribution to the study of tourmaline and spinel crystal chemistry.
Ca-O-analogue of schorl.


Classification of LucchesiiteHide

Approved
Approval Year:
2015

Physical Properties of LucchesiiteHide

Vitreous
Colour:
Black
Streak:
Grey
Hardness:
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
3.226 g/cm3 (Calculated)
Comment:
calculated 3.209 g/cm3 (Sri Lanka) to 3.243 g/cm3 (Czech Republic)

Optical Data of LucchesiiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.670() nε = 1.655(6)
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Visible
Comments:
O = very dark brown and E = light brown (Sri Lanka), and O = opaque and E = dark brown (Czech Republic).

Chemical Properties of LucchesiiteHide

Formula:
CaFe2+3 Al6(Si6O18)(BO3)3(OH)3O
IMA Formula:
CaFe2+3Al6(Si6O18)(BO3)3(OH)3O

Crystallography of LucchesiiteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 16.0018(7) Å, c = 7.2149(3) Å
Ratio:
a:c = 1 : 0.451
Unit Cell V:
1,599.92 ų (Calculated from Unit Cell)
Z:
3

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
Type material(Ratnapura):
4.236(42)
3.490(72)
2.970(99)
2.587(100)
2.048(65)
1.926(43)
1.666(38)
1.512(42)
Co-type material(Mirošov)
6.424(53)
4.249(41)
4.007(29)
3.503(100)
2.979(100)
2.591(84)
2.413(22)
2.053(49)

Type Occurrence of LucchesiiteHide

General Appearance of Type Material:
anhedral habitus (up to ~ 5 mm), as a broken part of a columnar crystal, whereas that from the Czech Republic forms graphic intergrowths with quartz in large aggregates up to 5 cm
Place of Conservation of Type Material:
Type material (SL) is deposited in the collections of the Museum of Mineralogy, Earth Sciences Department, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, catalogue number 33198/1. Co-type material (CR) is deposited in the Moravian Museum,
Geological Setting of Type Material:
anatectic pegmatite
Associated Minerals at Type Locality:

Synonyms of LucchesiiteHide

Relationship of Lucchesiite to other SpeciesHide

Other Members of this group:
AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)Trig. 3m : R3m
BosiiteNaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig.
Chromo-alumino-povondraiteNa(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
DarrellhenryiteNa(LiAl2)Al6(BO3)3Si6O18(OH)3O Trig. 3m : R3m
DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-feruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3F
Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-schorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-tsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-uviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Foitite(□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OHTrig. 3m : R3m
LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Luinaite-(OH)Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Mon. m : Bm
Magnesio-foitite(□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig.
MaruyamaiteK(MgAl2)(Al5Mg)(BO3)3(Si6O18)(OH)3OTrig. 3m : R3m
OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig.
Oxy-chromium-draviteNa(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Oxy-draviteNa(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Oxy-foitite□(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m (3 2/m) : R3m
Oxy-rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3O
Oxy-schorlNa(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Oxy-uviteCaMg3Al6(Si6O18)(BO3)3(OH)3O
Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3OTrig. 3m : R3m
PovondraiteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3OTrig.
Rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
TsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
UM2000-64-SiO:BFeHKMgK, Mg, Fe, Si, B, O, H
Unnamed (Pb-dominant Tourmaline)(Pb,Na)(Li,Al)3Al6(Si6O18)(BO3)3(OH)3(F,OH)
Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
Vanadio-oxy-chromium-draviteNa(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m

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 LucchesiiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bosi, F., Skogby, H., Ciriotti, M.E., Gadas, P., Novák, M., Cempírek, J., Všianský, D. and Filip, J. (2015) Lucchesiite, IMA 2015-043. CNMNC Newsletter No. 27, October 2015, page 1224; Mineralogical Magazine, 79, 1229–1236.
Bosi, F., Skogby, H., Ciriotti, M.E., Gadas, P., Novák, M., Cempírek, J., Všianský, D., and Filip, J., 2016. Lucchesiite, CaFe#2+#^3Al^6(Si^6O^18)(BO^3)^3(OH)^3O, a new mineral species of the tourmaline supergroup. Mineralogical Magazine 80(1)

Internet Links for LucchesiiteHide

Localities for LucchesiiteHide

ⓘ - 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.
Czech Republic (TL)
 
  • Vysočina Region
    • Žďár nad Sázavou District
Bosi, F., Skogby, H., Ciriotti, M.E., Gadas, P., Novák, M., Cempírek, J., Všianský, D. and Filip, J. (2015) Lucchesiite, IMA 2015-043. CNMNC Newsletter No. 27, October 2015, page 1224; Mineralogical Magazine, 79, 1229–1236. ; Bosi, F., Skogby, H., Ciriotti, M.E., Gadas, P., Novák, M., Cempírek, J., Všianský, D., and Filip, J., 2016. Lucchesiite, CaFe#2+#^3Al^6(Si^6O^18)(BO^3)^3(OH)^3O, a new mineral species of the tourmaline supergroup. Mineralogical Magazine 80(1)
Sri Lanka (TL)
 
  • Sabaragamuwa Province
    • Ratnapura District
Bosi, F., Skogby, H., Ciriotti, M.E., Gadas, P., Novák, M., Cempírek, J., Všianský, D. and Filip, J. (2015) Lucchesiite, IMA 2015-043. CNMNC Newsletter No. 27, October 2015, page 1224; Mineralogical Magazine, 79, 1229–1236.
Mineral and/or Locality  
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