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Paraspurrite (Paraspurrit)

Pictures (1 Images total)

Spurrit (ursprünglich als Paraspurrit bestimmt)
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Spurrit (ursprünglich als Paraspurrit bestimmt)
Bildbreite: 3 cm, Fundort: Darwin, Inyo Co., Kalifornien, USA
Copyright: Maurice de Graaf; Contribution: thdun5
Location: USA/Kalifornien (California)/Inyo Co./Darwin District/Darwin
Mineral: Paraspurrite
Image: 1271691353
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Spurrit (ursprünglich als Paraspurrit bestimmt)

Bildbreite: 3 cm, Fundort: Darwin, Inyo Co., Kalifornien, USA
Copyright: Maurice de Graaf
Contribution: thdun5 2010-04-19
Locality: Darwin / Darwin District / Inyo Co. / Kalifornien (California) / USA

Collectors Summary

Color farblos
Streak color weiß
Cleavages {001} undeutlich
Solubility +++ Säuren
Crystal System monoklin, P21/a

Additional information / Summary

Paraspurrit = Spurrit

Chemism

Chemical formula

Ca5(SiO4)2(CO3)

Additional chem. information

diskreditiert - vergleichbar mit polysynthetischen verzwillingtem Spurrit

Chemical composition

Calcium, Silicium, Kohlenstoff, Sauerstoff

Unit weight: 444.56757 u; Number of atoms in the formula: 19

Info

Empirical formula:

Ca5(SiO4)2(CO3)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Carbon

C

2.70

1

5.26

12.0107800

12.0107800
Oxygen

O

39.59

11

57.89

15.9994300

175.9937300
Silicon

Si

12.63

2

10.53

28.0855300

56.1710600
Calcium

Ca

45.08

5

26.32

40.0784000

200.3920000

Analysis wt%

SiO2 : 27.25, CaO : 62.78, CO2 : 8.65 (Ref: American Mineralogist 77)

Strunz 9th edition incl. updates

9.AH.15

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
H: Insel(Neso)silikate mit CO3, SO4, PO4, etc.
15:

Classification by Hölzel

9.AJ.540

9: SILICATES
A: Nesosilicates
J: Nesosilicates with other complex Anions
5: C large

Dana 8th edition

53.01.02.01

53: Nesosilicates Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
01: Nesosilicates Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations with (CO3)

IMA status

diskreditiert - Neue Mineralien - IMA WEB-Seite Okt. 2009

Mineral status

Mineralstatus fragwürdig

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.027
Birefringence chart\! Paraspurrite title=Birefringence chart Paraspurrite

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

1.650

RI value β

1.672

RI value γ / ε

1.677

Ri mean

1.666

2V angle

Biaxial (-) 47°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

10.473

Cell parameters b (Å)

6.706

Cell parameters c (Å)

27.78

Cell parameters a/b or c/a

1.562

Cell parameters c/b

4.143

Cell parameters α

90°

Cell parameters β

90.58

Cell parameters γ

90°

Z

8

Volumne (ų)

1950.943

X-Ray Powder Diffraction

6.92(80),
6.03(30),
4.62(40),
3.47(100),
2.716(40),
2.698(50),
2.647(40),
1.983(60)
XRD chart Paraspurrite

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

Physical Properties

Density (g/cm³)

3

3.027 ( ρ calc. Mineralienatlas )

Cleavages

{001} undeutlich

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/Inyo Co./Darwin District/Darwin

Preface

Author (Name, Year)

Colville & Colville, 1977

References

Joel D. Grice, Paul M. Adams, Ralph Rowe: Discreditation of paraspurrite. American Mineralogist 95 (2010) S.876-879.

IMA 09-B, diskreditiert - Neue Mineralien - IMA WEB-Seite Okt. 2009

American Mineralogist 62 (1977), 1003

Other languages

German

Paraspurrit

Spanish

Paraspurrita

English

Paraspurrite

French

Paraspurrite

CNMNC (IMA)-Number

IMA 1977-016