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UM1999-36-SiO:CaCeHMnNaNbSrZr (UM1999-36)

Collectors Summary

Crystal System trigonal, R3

Chemism

Chemical formula

Na17(Ca,Ce,Sr)2Mn3(Zr,Nb)4Si25O73(O,OH,F,Cl)5

Chemical composition

Calcium, Cerium, Chlor, Mangan, Natrium, Niob, Silicium, Strontium, Zirconium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 3029.875804725 u; Number of atoms in the formula: 130.5

Info

Empirical formula:

Na17(Ca0.6Ce0.3Sr0.1)2Mn3(Zr0.75Nb0.25)4Si25O73(O0.55(OH)0.3F0.1Cl0.05)5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.05

1.5

1.15

1.0079470

1.5119205
Oxygen

O

40.79

77.25

59.20

15.9994300

1,235.9559675
Fluorine

F

0.31

0.5

0.38

18.9984033

9.4992016
Sodium

Na

12.90

17

13.03

22.9897702

390.8260934
Silicon

Si

23.17

25

19.16

28.0855300

702.1382500
Chlorine

Cl

0.29

0.25

0.19

35.4532000

8.8633000
Calcium

Ca

1.59

1.2

0.92

40.0784000

48.0940800
Manganese

Mn

5.44

3

2.30

54.9380499

164.8141497
Strontium

Sr

0.58

0.2

0.15

87.6210000

17.5242000
Zirconium

Zr

9.03

3

2.30

91.2242000

273.6726000
Niobium

Nb

3.07

1

0.77

92.9063820

92.9063820
Cerium

Ce

2.77

0.6

0.46

140.1161000

84.0696600

Strunz 9th edition incl. updates

9.CO.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
O: ~[Si9O27]18- neuner-Ringe
10:Eudialyt-Gruppe

Mineral status

unbenannt gültig

Optical Properties

max. Birefringence

0.003
Birefringence chart\! UM1999-36-SiO:CaCeHMnNaNbSrZr title=Birefringence chart UM1999-36-SiO:CaCeHMnNaNbSrZr

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

ω = 1.611

RI value γ / ε

ε = 1.614

2V angle

Uniaxial(-)

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

146

Space Group

R3

Cell parameters a (Å)

14.182(7)

Cell parameters b (Å)

-

Cell parameters c (Å)

30.37(1)

Cell parameters a/b or c/a

2.141

Cell parameters c/b

-

Volume (ų)

5289.936

References

Dorian G.W. Smith & Ernest H. Nickel (2007) A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist v. 45, p.983-1055

Alternative Name

UM1999-36

CNMNC (IMA)-Number

UM1999-36-SiO:CaCeHMnNaNbSrZr

IDs

GUSID (Global unique identifier short form) u8C_HGOl7EmWvHWCUbHgbQ
GUID (Global unique identifier) 1CBFC0BB-A563-49EC-96BC-758251B1E06D
Database ID 6409