Sarcolite Mineral Data

Sarcolite Mineral Data +

General Sarcolite Information

Chemical Formula:

NaCa6Al4Si6O24F (?)

Composition:

Molecular Weight = 942.88 gm

Sodium 2.44 % Na 3.29 % Na₂O

Calcium 25.50 % Ca 35.68 % CaO

Aluminum 11.45 % Al 21.63 % Al₂O₃

Silicon 17.87 % Si 38.23 % SiO₂

Oxygen 40.72 % O

Fluorine 2.01 % F 2.01 % F

- % F -0.85 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaCa₆Al₄Si₆O₂₄F

Environment:

In contact metamorphosed limestone-bearing volcanic ejecta.

IMA Status:

Valid Species (Pre-IMA) 1807

Locality:

Monte Somma, Vesuvious, Italy. Link to MinDat.org Location Data.

Name Origin:

From the Greek for "flesh", alluding to the color.

Synonym:

ICSD 100413

PDF 42-1367

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Sarcolite Crystallography

Axial Ratios:

a:c = 1:1.25277

Cell Dimensions:

a = 12.343, c = 15.463, Z = 4; V = 2,355.78 Den(Calc)= 2.66

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.75(1), 3.34(0.8), 2.85(0.7),

Crystal Structure:

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Giuseppetti G , Mazzi F , Tadini C , Tschermaks Mineralogische und Petrographische Mitteilungen , 24 (1977) p.1-21, The crystal structure of sarcolite, Locality: Vesuvius volcano, Bay of Naples, Italy

Physical Properties of Sarcolite

Color:

Flesh pink, Red, Reddish white.

Density:

2.91 - 2.96, Average = 2.93

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Sarcolite

Gladstone-Dale:

CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.11 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2291,KPDmeas= 0.2077,KC= 0.2064

Optical Data:

Uniaxial (+), w=1.604, e=1.615, bire=0.0110.

Calculated Properties of Sarcolite

Electron Density:

r_electron=2.91 gm/cc
note: r_Sarcolite=2.94 gm/cc.

Fermion Index

Fermion Index = 0.00888
Boson Index = 0.99112

Photoelectric:

PE_Sarcolite= 4.21 barns/electron
U=PE_Sarcolite x r_electron= 12.26 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Sarcolite is Not Radioactive

Sarcolite Classification

Dana Class:

76.3.2.1 (76)Tectosilicate Al-Si Framework

(76.3)with other Be/Al/Si frameworks

(76.3.2)Dana Group

76.3.2.1 Sarcolite NaCa6Al4Si6O24F(?) I 4/m 4/m

Strunz Class:

VIII/J.13-30 VIII - Silicates

VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders

VIII/J.13 - Sodalite group, Marialite - Kalborsite series

VIII/J.13-10 Marialite Na4Al3Si9O24Cl I 4/m 4/m

VIII/J.13-20 Meionite Ca4Al6Si6O24CO3 P 4/m 4/m

VIII/J.13-25 Silvialite! (Ca,Na)4Al6Si6O24(SO4,CO3) I 4/m 4/m

VIII/J.13-30 Sarcolite NaCa6Al4Si6O24F(?) I 4/m 4/m

VIII/J.13-40 Kalborsite K6Al4Si6BO20(OH)4Cl P 42m 4 2m

Other Sarcolite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Ford32)

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Sarcolite

NaCa6Al4Si6O24F (?)
Dana No: 76.3.2.1 Strunz No: VIII/J.13-30
Locality:

Notes: