Latiumite Mineral Data (original) (raw)

General Latiumite Information

Help on Chemical Formula: Chemical Formula:

(Ca,K)8(Al,Mg,Fe)(Si,Al)10O25(SO4)

Help on Composition: Composition:

Molecular Weight = 1,124.01 gm

Potassium 5.91 % K 7.12 % K2O

Sodium 0.82 % Na 1.10 % Na2O

Calcium 21.04 % Ca 29.44 % CaO

Magnesium 0.43 % Mg 0.72 % MgO

Aluminum 13.20 % Al 24.95 % Al2O3

Iron 0.79 % Fe 0.58 % FeO / 0.50 % Fe2O3

Silicon 13.24 % Si 28.33 % SiO2

Carbon 0.43 % C 1.57 % CO2

Sulfur 2.28 % S 5.70 % SO3

Oxygen 41.85 % O

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Ca5.9K1.7Na0.4Al0.8Mg0.2Fe2+0.09Fe3+0.07Si5.3Al4.7O25(SO4)0.8(CO3)0.4

Help on Environment: Environment:

In blocks of metamorphosed limestone ejected by volcanism.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1953

Help on Locality: Locality:

From alban, in the Alban Hills, Lazio, and from Pitigliano, near Grosseto, Tuscany, Italy. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

For the Latin name of the district of origin, Latium, Italy.

Help on Name Pronunciation: Name Pronunciation:

Latiumite + Pronunciation Say LATIUMITE

Help on Synonym: Synonym:

ICSD 10263

PDF 25-1202

Latiumite Image

Click Here for Larger Latiumite Image in a New Browser Window Images:

Latiumite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =2.374:1:2.1279

Help on Cell Dimensions: Cell Dimensions:

a = 12.06, b = 5.08, c = 10.81, Z = 1; beta = 106° V = 636.62 Den(Calc)= 2.93

Help on Crystal System: Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 21

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.86(1), 2.96(0.9), 3.06(0.9),

Click Here for Large Latiumite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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I - Data Info
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Help on Above

| | Cannillo E , Dal Negro A , Rossi G , American Mineralogist , 58 (1973) p.466-470, The crystal structure of latiumite, a new type of sheet silicate | | ----------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Latiumite

Help on Cleavage: Cleavage:

{100} Perfect

Help on Color: Color:

White.

Help on Density: Density:

2.93

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Habit: Habit:

Tabular - Form dimensions are thin in one direction.

Help on Hardness: Hardness:

5.5-6 - Knife Blade-Orthoclase

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Latiumite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2075,KPDmeas= 0.2075,KC= 0.2059
Ncalc = 1.6

Help on Optical Data: Optical Data:

Biaxial (+/-), a=1.6-1.603, b=1.606-1.609, g=1.614-1.615, bire=0.0120-0.0140, 2V(Calc)=84-88, 2V(Meas)=83-90. Dispersion r > v marked.

Calculated Properties of Latiumite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.91 gm/cc
note: Specific Gravity of Latiumite =2.93 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0074956571
Boson Index = 0.9925043429

Help on Photoelectric: Photoelectric:

PELatiumite = 4.47 barns/electron
U=PELatiumite x relectron= 13.00 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 84.63 (Gamma Ray American Petroleum Institute Units)
Concentration of Latiumite per GRapi unit = 1.18 (%)

Estimated Radioactivity from Latiumite - barely detectable

Latiumite Classification

Help on Dana Class: Dana Class:

73.01.02.01 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.01)with double layers

(73.01.02)Latiumite group

73.01.02.01 Latiumite (Ca,K)8(Al,Mg,Fe)(Si,Al)10O25(SO4) P 21 2

73.01.02.02 Tuscanite K(Ca,Na)6(Si,Al)10O22(SO4,CO3,(OH)2)•(H2O) P 21/a 2/m

Help on Strunz Class: Strunz Class:

09.EG.45 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EG -Double nets with 6-membered and larger rings

09.EG.45 Latiumite (Ca,K)8(Al,Mg,Fe)(Si,Al)10O25(SO4) P 21 2

09.EG.45 Tuscanite K(Ca,Na)6(Si,Al)10O22(SO4,CO3,(OH)2)•(H2O) P 21/a 2/m

Other Latiumite Information

Help on References: References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)

Help on See Also: See Also:

Links to other databases for Latiumite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Latiumite here :
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Print or Cut-and-Paste your Latiumite Specimen Label here :

Latiumite

(Ca,K)8(Al,Mg,Fe)(Si,Al)10O25(SO4)
Dana No: 73.01.02.01 Strunz No: 09.EG.45
Locality:

Notes: