[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store] See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM] Rare Minerals, Meteorites, Equipment and Analytical Services Excalibur Mineral Company, World leaders in the supply of rare species Serving the scientific and collector communities since 1974 General Mottanaite-(Ce) InformationCa4(Ce,Ca)2AlBe2[Si4B4O22]O2 |
Molecular Weight = 1,007.13 gm |
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Calcium 18.31 % Ca 25.61 % CaO |
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Cerium 20.87 % Ce 24.44 % Ce2O3 |
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Thorium 2.30 % Th 2.62 % ThO2 |
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Titanium 0.48 % Ti 0.79 % TiO2 |
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Beryllium 0.72 % Be 1.99 % BeO |
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Aluminum 1.34 % Al 2.53 % Al2O3 |
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Iron 2.22 % Fe 3.17 % Fe2O3 |
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Silicon 11.15 % Si 23.86 % SiO2 |
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Boron 4.29 % B 13.83 % B2O3 |
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Hydrogen 0.05 % H 0.45 % H2O |
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Oxygen 37.33 % O |
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Fluorine 0.94 % F 0.94 % F |
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- %
F -0.40 % -O=F2 |
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______ ______ |
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100.00 % 99.84 % = TOTAL OXIDE |
Ca4Ce1.5Th0.1Ca0.6Al0.5Fe3+0.4Ti0.1Be0.8(Si4B4O22)O(OH)0.5F0.5 |
Miarolitic cavities in alkali-syenitic ejecta enclosed in pyroclastic formations of the Roma Comagmatic Province. (hellandite group; structure) |
Approved IMA 2001 (Dana # Added) |
Sabatini volcanic complex, Latium, Italy. Link to MinDat.org Location Data. |
Named for Annibale Mottana, Professor of Mineralogy at the University of Roma Tre (Italy). |
IMA2001-020 |
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Mottanaite-(Ce) Crystallographya:b:c =4.0101:1:2.1592 |
a = 19.032, b = 4.746, c = 10.248, Z = 2; beta = 110.97° V = 864.35 Den(Calc)= 3.87 |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a |
By Intensity(I/Io): 2.854(1)(411), 2.646(0.86)(413), 2.916(0.86)(212),
3.085(0.85)(412), 2.635(0.84)(611), 2.647(0.84)(013), 3.243(0.8)(410), 3.452(0.67)(2 |
| Physical Properties of Mottanaite-(Ce)None |
Pale brown. |
3.61 |
Transparent |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
Tabular - Form dimensions are thin in one direction. |
Vitreous (Glassy) |
| Optical Properties of Mottanaite-(Ce)CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.093 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1793,KPDmeas= 0.1922,KC= 0.1978 Ncalc = 1.71 - 1.77 Biaxial (-), a=1.68, b=1.694, g=1.708, bire=0.0280 |
| Calculated Properties of Mottanaite-(Ce)Bulk Density (Electron Density)=3.44 gm/cc |
note: Specific Gravity of Mottanaite-(Ce) =3.61 gm/cc. Fermion Index = 0.02 |
Boson Index = 0.98 PEMottanaite-(Ce) = 155.80 barns/electron |
U=PEMottanaite-(Ce) x relectron= 535.32 barns/cc. |
GRapi = 46,782.29 (Gamma Ray American Petroleum Institute Units)
Mottanaite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 10 cm box)
650.17 ±162.54 grams of pure Mottanaite-(Ce) .
Weight of pure Mottanaite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.61 gm/cc.* | Mottanaite-(Ce) Classification54.02.02.05 (54)Nesosilicate Borosilicates and Some Beryllosilicates |
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(54.02)with B in [4] coordination |
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(54.02.02)Hellandite group |
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09.DK.20 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DK -Inosilicates with 5-periodic single chains |
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| Other Mottanaite-(Ce) InformationNAME( AmMin, Vol 87, p 739) PHYS. PROP.(AmMin, Vol 87, p 739) OPTIC PROP.(AmMin, Vol 87, p 739) |
Links to other databases for Mottanaite-(Ce) : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Mottanaite-(Ce) using: Visit our Advertisers for Mottanaite-(Ce) : B & L Fine MineralsDan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Excalibur Minerals Exceptional Minerals Fabre Minerals John Betts Fine Minerals Lapis Mineral Journal Mineral News UV Tools Wrights Rock Shop Translate Mottanaite-(Ce) Mineral Data : Ask about Mottanaite-(Ce) here : Print or Cut-and-Paste your Mottanaite-(Ce) Specimen Label here :
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