[Fine Minerals] [What's New] [Mineral Galleries] [My Collection] [Mineral Auctions] Dan Weinrich Fine Minerals Full-time professional mineral dealer with over 31 years experience in mineral collecting And 15 years selling mineral specimens on the internet and at major mineral shows General Latiumite Information Chemical Formula: |
(Ca,K)8(Al,Mg,Fe)(Si,Al)10O25(SO4) |
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 |
Empirical Formula: |
Ca5.9K1.7Na0.4Al0.8Mg0.2Fe2+0.09Fe3+0.07Si5.3Al4.7O25(SO4)0.8(CO3)0.4 |
Environment: |
In blocks of metamorphosed limestone ejected by volcanism. |
IMA Status: |
Valid Species (Pre-IMA) 1953 |
Locality: |
From alban, in the Alban Hills, Lazio, and from Pitigliano, near Grosseto, Tuscany, Italy. Link to MinDat.org Location Data. |
Name Origin: |
For the Latin name of the district of origin, Latium, Italy. |
Name Pronunciation: |
Latiumite + Pronunciation |
Synonym: |
ICSD 10263 |
|
PDF 25-1202 |
| | Latiumite Image
Images:
|
|
Latiumite Crystallography Axial Ratios: |
a:b:c =2.374:1:2.1279 |
Cell Dimensions: |
a = 12.06, b = 5.08, c = 10.81, Z = 1; beta = 106° V = 636.62 Den(Calc)= 2.93 |
Crystal System: |
Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 21 |
X Ray Diffraction: |
By Intensity(I/Io): 2.86(1), 2.96(0.9), 3.06(0.9), |
Crystal Structure:
|
Mouse
|
| Physical Properties of Latiumite Cleavage: |
{100} Perfect |
Color: |
White. |
Density: |
2.93 |
Diaphaneity: |
Transparent to Translucent |
Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
Habit: |
Tabular - Form dimensions are thin in one direction. |
Hardness: |
5.5-6 - Knife Blade-Orthoclase |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
| Optical Properties of Latiumite 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 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 Electron Density: |
Bulk Density (Electron Density)=2.91 gm/cc |
note: Specific Gravity of Latiumite =2.93 gm/cc. Fermion Index: |
Fermion Index = 0.0074956571 |
Boson Index = 0.9925043429 Photoelectric: |
PELatiumite = 4.47 barns/electron |
U=PELatiumite x relectron= 13.00 barns/cc. Radioactivity: |
|
GRapi = 84.63 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Latiumite - barely detectable | Latiumite Classification Dana Class: |
73.01.02.01 (73)Phyllosilicate Condensed Tetrahedral Sheets |
|
(73.01)with double layers |
|
(73.01.02)Latiumite group |
|
|
Strunz Class: |
09.EG.45 09 - SILICATES (Germanates) |
|
09.E - Phyllosilicates |
|
09.EG -Double nets with 6-membered and larger rings |
|
|
| Other Latiumite Information References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) |
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 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Latiumite using: Visit our Advertisers for Latiumite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Latiumite Mineral Data : Ask about Latiumite here : Print or Cut-and-Paste your Latiumite Specimen Label here :
| |
|
| |