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Ciprianiite (Ciprianiit)

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Ciprianiit
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Ciprianiit
hellgelbe, taflige Kristalle von Ciprianiit, Tre Croci, Vetralla, Vico Lake, Viterbo Provinz, Latium, Italien; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci
Mineral: Ciprianiite
Image: 1587408147
License: Usage for Mineralienatlas project only
Ciprianiit

hellgelbe, taflige Kristalle von Ciprianiit, Tre Croci, Vetralla, Vico Lake, Viterbo Provinz, Latium, Italien; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-04-20
Locality: Tre Croci / Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien

Collectors Summary

Color braun
Streak color weiß
Lustre Glasglanz
Cleavages deutlich bis gut {100}
Fracture muschelig
Crystal System monoklin, P2/a

Chemism

Chemical formula

Ca4[(Th,U),Ca]Σ2Al(Be0.5☐1.5)Σ2[B4Si4O22](OH)2

Chemical composition

Aluminium, Beryllium, Calcium, Silicium, Thorium, Bor, Sauerstoff, Uran, Wasserstoff, Vakanz

Unit weight: 918.5638214275 u; Number of atoms in the formula: 42

Info

Empirical formula:

Ca4[((Th0.75U0.25))0.75Ca0.25]Al(Be0.5Vc1.5)[B4Si4O22](OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Vacancy

Vc

0.00

1.5

3.57

0.0000000

0.0000000
Hydrogen

H

0.22

2

4.76

1.0079470

2.0158940
Beryllium

Be

0.49

0.5

1.19

9.0121823

4.5060912
Boron

B

4.71

4

9.52

10.8117000

43.2468000
Oxygen

O

41.80

24

57.14

15.9994300

383.9863200
Aluminium

Al

2.94

1

2.38

26.9815382

26.9815382
Silicon

Si

12.23

4

9.52

28.0855300

112.3421200
Calcium

Ca

18.54

4.25

10.12

40.0784000

170.3332000
Thorium

Th

14.21

0.56

1.34

232.0381100

130.5214369
Uranium

U

4.86

0.19

0.45

238.0289130

44.6304212

Analysis wt%

SiO2 : 22.94, B2O3 : 13.28, TiO2 : 0.73, Al2O3 : 2.33, Fe2O3 : 2.87, BeO : 1.95, ThO2 : 15.80, UO2 : 0.87, La2O3 : 1.39, Ce2O3 : 5.48, Pr2O3 : 0.86, Nd2O3 : 3.03, CaO : 24.60, F : 0.89, H2O : 0.47, Ln2O3 : 11.54 (Ref: American Mineralogist 2002)

Strunz 9th edition incl. updates

9.DK.20

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
K: Ketten- und Bandsilikate mit 5-periodischen Einzelketten
20:

Lapis Classification

VIII/F.36-040

VIII: SILIKATE
F: Ketten- und Bandsilikate
36: Komplexe Kettenstrukturen (Zylinderketten u.a.)

Classification by Hölzel

9.DE.880

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
E: Orthorhombic Pyroxenes and Pyroxenoides
8: Hellandite-Group

Dana 8th edition

54.02.02.06

54: Nesosilicates Nesosilicate Borosilicates and Some Beryllosilicates
02: Nesosilicates Nesosilicate Borosilicates and Some Beryllosilicates with B in [4] coordination
02: Hellandite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Hellandite group

Optical Properties

Color

braun

Streak color

weiß

Lustre

Glasglanz

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/a

Cell parameters a (Å)

19.059

Cell parameters b (Å)

4.729

Cell parameters c (Å)

10.291

Cell parameters a/b or c/a

4.030

Cell parameters c/b

2.176

Cell parameters α

90°

Cell parameters β

111.33

Cell parameters γ

90°

Z

2

Volumne (ų)

863.993

X-Ray Powder Diffraction

4.729(70),
3.454(80),
3.089(90),
2.846(100),
2.653(80),
2.648(80),
2.634(80)
XRD chart Ciprianiite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.905 (berechnet) 3.61 (gemessen)

3.531 ( ρ calc. Mineralienatlas )

Cleavages

deutlich bis gut {100}

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci

Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano/Sacrofano-Caldera/Mt. Cavalluccio

Preface

Author (Name, Year)

Della Ventura & Bonazzi & Oberti & Ottolini, 2002

References

Roberta Oberti; Antonio Langone; Massimo Boiocchi; Ezio Bernabè; Frank C. Hawthorne: News from the hellandite group: the redefinition of mottanaite and ciprianiite and the new mineral description of ferri-mottanaite-(Ce), the first Fe3+-dominant hellandite. European Journal of Mineralogy Jhrg. 31, Nr. 4 (2019) S. 799-806.

American Mineralogist 87 (2002), 739

IMA group assignments

Other languages

German

Ciprianiit

French

Ciprianiite

English

Ciprianiite

Spanish

Ciprianiíta

Russian

Киприаниит

Russian

Чиприаниит

CNMNC (IMA)-Number

IMA 2001-021

CNMNC symbol

Symbol

Cip