Ciprianiite Mineral Data

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General Ciprianiite Information

Chemical Formula:

Ca4[(Th,U)(REE)]2(Al,[ ])2[Si4B4O22](OH,F)2

Composition:

Molecular Weight = 1,032.51 gm

Lithium 0.03 % Li 0.06 % Li₂O

Calcium 17.86 % Ca 24.98 % CaO

La,Ce,Pr,Nd,Sm, 10.18 % RE 11.88 % REE₂O₃

Thorium 14.16 % Th 16.11 % ThO₂

Magnesium 0.12 % Mg 0.20 % MgO

Uranium 0.69 % U 0.78 % UO₂

Titanium 0.46 % Ti 0.77 % TiO₂

Beryllium 0.72 % Be 1.99 % BeO

Aluminum 1.25 % Al 2.37 % Al₂O₃

Iron 2.06 % Fe 2.94 % Fe₂O₃

Silicon 10.91 % Si 23.34 % SiO₂

Boron 4.19 % B 13.49 % B₂O₃

Hydrogen 0.05 % H 0.47 % H₂O

Oxygen 36.43 % O

Fluorine 0.90 % F 0.90 % F

- % F -0.38 % -O=F₂

______ ______

100.00 % 99.89 % = TOTAL OXIDE

Empirical Formula:

Ca₄REE_0.73Th_0.63Ca_0.6U_0.03Al_0.48Fe³⁺_0.38Ti_0.1Mg_0.05Be_0.82Li_0.04B₄Si_4.01O₂₂O_0.97 (OH)_0.54F_0.49

Environment:

Alkali-syenitic ejecta enclosed in pyroclastic formations of the Roma Comagmatic Province. (hellandite group; structure)

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Vico volcanic complex, Latium, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Curzio Cipriani, Professor of Mineralogy and Head of the Museum of Natural History, Universita di Firenze, Italy.

Synonym:

IMA2001-021

Ciprianiite Image

Images:

Ciprianiite

Comments: Black crystal of ciprianiite in quartz.
Location: Monte Cavalluccio, Capagnano, Roma, Lazio, Italy. Scale: Picture size 2 mm.
© Paul M. Schumacher

Ciprianiite Crystallography

Axial Ratios:

a:b:c =4.0302:1:2.1761

Cell Dimensions:

a = 19.059, b = 4.729, c = 10.291, Z = 2; beta = 111.33° V = 863.99 Den(Calc)= 3.97

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a

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

By Intensity(I/I_o): 2.846(1)(411), 3.089(0.86)(412), 2.634(0.84)(611),2.653(0.8)(413), 2.648(0.79)(013), 3.454(0.79)(212), 4.729(0.72)(010),

Physical Properties of Ciprianiite

Cleavage:

{100} Fair

Color:

Pale brown.

Diaphaneity:

Transparent

Fracture:

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

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Tabular - Form dimensions are thin in one direction.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Ciprianiite

Gladstone-Dale:

CI calc= 0.116 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1748,KC= 0.1977
Ncalc = 1.78

Optical Data:

Biaxial (-), a=1.68, b=1.694, g=1.708, bire=0.0280

Calculated Properties of Ciprianiite

Electron Density:

Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Ciprianiite =3.97 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Ciprianiite= 396.65 barns/electron
U=PE_Ciprianiite x r_electron=1,486.95 barns/cc.

Radioactivity:

GRapi = 340,906.86 (Gamma Ray American Petroleum Institute Units)
Concentration of Ciprianiite per GRapi unit = 2.93 (PPM)

Ciprianiite 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) 89.22 ± 22.31 grams of pure Ciprianiite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 8922.3 ±2230.6 grams of pure Ciprianiite .

**Estimated Radioactivity from Ciprianiite** - strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.84 cm	7,581,627	2.05E-04	340,906.86	112.08
100 gm / 3.64 cm	758,163	2.05E-05	34,090.69	11.21
10 gm / 1.69 cm	75,816	2.05E-06	3,409.07	1.12
1 gm / 7.84 mm	7,582	2.05E-07	340.91	0.11
0.1 gm / 3.64 mm	758	2.05E-08	34.09	0.01
0.01 gm / 1.69 mm	76	2.05E-09	3.41	0.00
0.001 gm / 0.78 mm	8	2.05E-10	0.34	0.00

Weight of pure Ciprianiite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.97 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem

Ciprianiite Classification

Dana Class:

54.02.02.06 (54)Nesosilicate Borosilicates and Some Beryllosilicates

(54.02)with B in [4] coordination

(54.02.02)Hellandite group

54.02.02.01 Hellandite-(Y) (Ca,REE)4(Y,Ce)2(Al,[])2[Si4B4O22](OH)2 P 2/a 2/m

54.02.02.02 Tadzhikite-(Y)! Ca4(Y,Ce)2(Ti,Al,Fe,[])2[Si4B4O22](OH)2 P 2/a 2/m

54.02.02.03 Tadzhikite-(Ce) Ca4(Ce,Y)2(Ti,Al,Fe,[])2[Si4B4O22](OH)2 P 2/a 2/m

54.02.02.04 Hellandite-(Ce)! (Ca3REE)4Ce2Al[]2[Si4B4O22](OH)2 P 2/a 2/m

54.02.02.05 Mottanaite-(Ce)! Ca4(Ce,Ca)2AlBe2[Si4B4O22]O2 P 2/a 2/m

54.02.02.06 Ciprianiite! Ca4[(Th,U)(REE)]2(Al,[])2[Si4B4O22](OH,F)2 P 2/a 2/m

54.02.02.07 Piergorite-(Ce)! Ca8Ce2(Al0.5Fe0.5)([],Li,Be)2Si6B8O36(OH,F)2 P 2/a 2/m

Strunz Class:

09.DK.20 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DK -Inosilicates with 5-periodic single chains

09.DK.20 Hellandite-(Y) (Ca,REE)4(Y,Ce)2(Al,[])2[Si4B4O22](OH)2 P 2/a 2/m

09.DK.20 Tadzhikite-(Ce) Ca4(Ce,Y)2(Ti,Al,Fe,[])2[Si4B4O22](OH)2 P 2/a 2/m

09.DK.20 Tadzhikite-(Y)! Ca4(Y,Ce)2(Ti,Al,Fe,[])2[Si4B4O22](OH)2 P 2/a 2/m

09.DK.20 Ciprianiite! Ca4[(Th,U)(REE)]2(Al,[])2[Si4B4O22](OH,F)2 P 2/a 2/m

09.DK.20 Hellandite-(Ce)! (Ca3REE)4Ce2Al[]2[Si4B4O22](OH)2 P 2/a 2/m

09.DK.20 Mottanaite-(Ce)! Ca4(Ce,Ca)2AlBe2[Si4B4O22]O2 P 2/a 2/m

Other Ciprianiite Information

References:

NAME( AmMin, 87:739) PHYS. PROP.(AmMin, 87:739) OPTIC PROP.(AmMin, 87:739)

See Also:

Links to other databases for Ciprianiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Uranium Minerals

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Ciprianiite

Ca4[(Th,U)(REE)]2(Al,[ ])2[Si4B4O22](OH,F)2
Dana No: 54.02.02.06 Strunz No: 09.DK.20
Locality:

Notes: