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Piergorite-(Ce)

Pictures (4 Images total)

Piergorit-(Ce)
Views (File:
1303062584
): 1332
Piergorit-(Ce)
Kristallgröße: 0,5 mm, Fundort: Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla
Mineral: Piergorite-(Ce)
Image: 1303062584
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Piergorit-(Ce)

Kristallgröße: 0,5 mm, Fundort: Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei
Contribution: thdun5 2011-04-17
Locality: Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien
Piergorit-(Ce)
Views (File:
1271686024
): 697
Piergorit-(Ce)
Bildbreite: 2 mm, Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci
Mineral: Piergorite-(Ce)
Image: 1271686024
Rating: 3.5 (votes: 2)
License: Usage for Mineralienatlas project only
Piergorit-(Ce)

Bildbreite: 2 mm, Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Chiappino
Contribution: thdun5 2010-04-19
Locality: Tre Croci / Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien
Piergorit-(Ce)
Views (File:
1271686923
): 649
Piergorit-(Ce)
Kristallgröße: 0,1 mm, Fundort: Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla
Mineral: Piergorite-(Ce)
Image: 1271686923
License: Usage for Mineralienatlas project only
Piergorit-(Ce)

Kristallgröße: 0,1 mm, Fundort: Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei
Contribution: thdun5 2010-04-19
Locality: Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien
Piergorit-(Ce) xx
Views (File:
1593718663
): 224
Piergorit-(Ce) xx
Tre Croci,Vetralla/Viterbo,Italien; Bildbreite 2,0mm, ertauscht von Pietro Gorini am MM-Tauschtag Cremona(IT), 9/2001.
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci
Mineral: Piergorite-(Ce)
Image: 1593718663
License: Usage for Mineralienatlas project only
Piergorit-(Ce) xx

Tre Croci,Vetralla/Viterbo,Italien; Bildbreite 2,0mm, ertauscht von Pietro Gorini am MM-Tauschtag Cremona(IT), 9/2001.
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2020-07-02
Locality: Tre Croci / Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien

Collectors Summary

Color farbloß bis blassgelb
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 5.5 - 6
Cleavages vollkommen (010)
Crystal System monoklin, P2/a

Chemism

Chemical formula

Ca8(Ce,Th,La,Nd)2(Al0.5Fe3+0.5)(☐,Li,Be)2Si6B8O36(OH,F)2

Chemical composition

Aluminium, Beryllium, Calcium, Cerium, Eisen, Lanthanum, Lithium, Neodymium, Silicium, Thorium, Bor, Fluor, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 1569.560232697 u; Number of atoms in the formula: 66.5

Info

Empirical formula:

Ca8(Ce0.55Th0.3La0.1Nd0.05)2(Al0.5Fe0.5)(Vc0.6Li0.3Be0.1)2Si6B8O36((OH)0.75F0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Vacancy

Vc

0.00

1.2

1.80

0.0000000

0.0000000
Hydrogen

H

0.10

1.5

2.26

1.0079470

1.5119205
Lithium

Li

0.27

0.6

0.90

6.9412000

4.1647200
Beryllium

Be

0.11

0.2

0.30

9.0121823

1.8024365
Boron

B

5.51

8

12.03

10.8117000

86.4936000
Oxygen

O

38.23

37.5

56.39

15.9994300

599.9786250
Fluorine

F

0.61

0.5

0.75

18.9984033

9.4992016
Aluminium

Al

0.86

0.5

0.75

26.9815382

13.4907691
Silicon

Si

10.74

6

9.02

28.0855300

168.5131800
Calcium

Ca

20.43

8

12.03

40.0784000

320.6272000
Iron

Fe

1.78

0.5

0.75

55.8452000

27.9226000
Lanthanum

La

1.77

0.2

0.30

138.9055200

27.7811040
Cerium

Ce

9.82

1.1

1.65

140.1161000

154.1277100
Neodymium

Nd

0.92

0.1

0.15

144.2430000

14.4243000
Thorium

Th

8.87

0.6

0.90

232.0381100

139.2228660

Analysis wt%

SiO2 : 23.90, B2O3 : 18.41, TiO2 : 0.71, Al2O3 : 1.47, Fe2O3 : 2.09, ThO2 : 5.73, UO2 : 0.79, Y2O4 : 0.44, La2O3 : 3.33, Ce2O3 : 6.24, Pr2O3 : 0.62, Nd2O3 : 1.57, CaO : 31.06, BeO : 0.60, Li2O : 0.48, F : 0.96, H2O : 0.50, Ln2O3 : 12.62 (Ref: American Mineralogist 2006)

Strunz 9th edition incl. updates

9.DL.10

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
L: Ketten- und Bandsilikate mit 5-periodischen Doppelketten, Si10O28
10:

Lapis Classification

VIII/F.36-050

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

Classification by Hölzel

9.DE.860

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

IMA status

anerkannt 2005

Mineral status

anerkanntes Mineral

Optical Properties

Color

farbloß bis blassgelb

Streak color

weiß

Diaphaneity (Transparency)

transparent (wasserklar)

Lustre

Glasglanz

max. Birefringence

0.018
Birefringence chart\! Piergorite-(Ce) title=Birefringence chart Piergorite-(Ce)

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.717

RI value β

1.728

RI value γ / ε

1.735

Ri mean

1.727

2V angle

Biaxial (-) 68°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/a

Cell parameters a (Å)

28.097

Cell parameters b (Å)

4.777

Cell parameters c (Å)

10.236

Cell parameters a/b or c/a

5.882

Cell parameters c/b

2.143

Cell parameters α

90°

Cell parameters β

96.82

Cell parameters γ

90°

Z

2

Volume (ų)

1364.148

X-Ray Powder Diffraction

3.33(40), 3.20(31), 3.01(34), 2.90(45), 2.78(43), 2.65(100), 1.91(48), 1.74(28)
XRD chart Piergorite-(Ce)

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5 - 6

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.67

3.821 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (010)

(Co-)Type locality

(Co-)Type locality

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

Preface

Associations

Klinopyroxen, Magnetit, Hellandit-(Ce), Titanit, Nosean, Baddeleyit, Afghanit, Danburit, Thorit, Vonsenit, Homilit

Rareness

extrem selten (nur an einem Sanidinit-Auswürfling gefunden)

Author (Name, Year)

Boiocchi & Callegari & Ottolini, 2006

Additional Information

Name ehrt die Mineraliensammler Giancarlo Pierini und Pietro Gorini

References

American Mineralogist 91 (2006), 1170.

Lapis 09/2006 Seite 8 & 35.

Other languages

German

Piergorit-(Ce)

English

Piergorite-(Ce)

CNMNC (IMA)-Number

IMA 2005-008

CNMNC symbol

Symbol

Pgo-Ce

IDs

GUSID (Global unique identifier short form) hUPgORRXmUuTiHOV6s5e4g
GUID (Global unique identifier) 39E04385-5714-4B99-9388-7395EACE5EE2
Database ID 3052