Carlfriesite Mineral Data

Carlfriesite Mineral Data

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General Carlfriesite Information

Chemical Formula:

CaTe++++2Te++++++O8

Composition:

Molecular Weight = 550.87 gm

Calcium 7.28 % Ca 10.18 % CaO

Tellurium 69.49 % Te 86.92 % TeO₂

Oxygen 23.23 % O

______ ______

100.00 % 97.10 % = TOTAL OXIDE

Empirical Formula:

CaTe₂TeO₈

IMA Status:

Approved IMA 1975

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 100661

PDF 29-333

Carlfriesite Image

Images:

Carlfriesite

Comments: Pale bright yellow crystalline carlfriesite botryoids on white calcite.
Location: Moctezuma, Sonora, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Carlfriesite Crystallography

Axial Ratios:

a:b:c =2.2211:1:1.7651

Cell Dimensions:

a = 12.576, b = 5.662, c = 9.994, Z = 4; beta = 115.56° V = 641.98 Den(Calc)= 5.70

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 3.167(1), 3.082(0.9), 5.063(0.6),

Crystal Structure:

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Effenberger H , Zemann J , Mayer H , American Mineralogist , 63 (1978) p.847-852, Carlfriesite: crystal structure, revision of chemical formula, and synthesis

Physical Properties of Carlfriesite

Cleavage:

[010] Distinct

Color:

Yellow.

Density:

6.3

Hardness:

3.5 - Copper Penny

Streak:

yellow

Optical Properties of Carlfriesite

Gladstone-Dale:

CI meas= 0.118 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1911,KPDmeas= 0.1729,KC= 0.1961

Optical Data:

Biaxial (-), a=1.982, b=2.095, g=2.19, bire=0.2080, 2V(Calc)=80, 2V(Meas)=80.

Calculated Properties of Carlfriesite

Electron Density:

r_electron=4.97 gm/cc
note: r_Carlfriesite=5.70 gm/cc.

Fermion Index

Fermion Index = 0.05573
Boson Index = 0.94427

Photoelectric:

PE_Carlfriesite= 245.73 barns/electron
U=PE_Carlfriesite x r_electron=1,220.46 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Carlfriesite is Not Radioactive

Carlfriesite Classification

Dana Class:

34.5.3.1 (34)Selenites - Tellurites - Sulfites

(34.5)Dana Type

(34.5.3)Dana Group

34.5.3.1 Carlfriesite CaTe2TeO8 C 2/c 2/m

Strunz Class:

IV/K.13-30 IV - Oxides

IV/K - Tellurides with [Te3O8]4- groups

IV/K.13 - Spiroffite - Carlfriesite series

IV/K.13-05 Zincospiroffite! Zn2Te3O8 C 2/c 2/m

IV/K.13-10 Spiroffite (Mn,Zn)2Te3O8 C 2/c 2/m

IV/K.13-20 Mroseite CaTe(CO3)O2 P bca 2/m 2/m 2/m

IV/K.13-30 Carlfriesite CaTe2TeO8 C 2/c 2/m

Other Carlfriesite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Carlfriesite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Carlfriesite Specimen Label here :

Carlfriesite

CaTe++++2Te++++++O8
Dana No: 34.5.3.1 Strunz No: IV/K.13-30
Locality:

Notes: