Graemite Mineral Data

Graemite Mineral Data +

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General Graemite Information

Chemical Formula:

CuTeO3·(H2O)

Composition:

Molecular Weight = 257.16 gm

Copper 24.71 % Cu 30.93 % CuO

Tellurium 49.62 % Te 62.06 % TeO₂

Hydrogen 0.78 % H 7.01 % H₂O

Oxygen 24.89 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu(TeO₃)·(H₂O)

IMA Status:

Approved IMA 1975

Locality:

Cole Shaft, Bisbee, Cochise County, Arizona, USA Link to MinDat.org Location Data.

Name Origin:

Named for Richard Graeme, American geologist.

Graemite Image

Images:

Graemite

Comments: Blue, massive graemite on quartz.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5.5 mm.
© Thomas Witzke / Abraxas-Verlag

Graemite Crystallography

Axial Ratios:

a:b:c =0.2656:1:0.2256

Cell Dimensions:

a = 6.805, b = 25.613, c = 5.78, Z = 10; V = 1,007.43 Den(Calc)= 4.24

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcmm

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

By Intensity(I/I_o): 6.395(1), 3.434(0.8), 12.803(0.5),

Physical Properties of Graemite

Cleavage:

[010] Good

Color:

Blue green, Green.

Density:

4.13

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

3-3.5 - Calcite-Copper Penny

Optical Properties of Graemite

Gladstone-Dale:

CI meas= -0.236 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.204 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2421,KPDmeas= 0.2486,KC= 0.2011

Optical Data:

Biaxial (+), a=1.92, b=1.96, g=2.2, bire=0.2800, 2V(Calc)=50, 2V(Meas)=48.5.

Calculated Properties of Graemite

Electron Density:

r_electron=3.79 gm/cc
note: r_Graemite=4.24 gm/cc.

Fermion Index

Fermion Index = 0.03976
Boson Index = 0.96024

Photoelectric:

PE_Graemite= 181.88 barns/electron
U=PE_Graemite x r_electron= 689.72 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Graemite is Not Radioactive

Graemite Classification

Dana Class:

34.2.1.1 (34)Selenites - Tellurites - Sulfites

(34.2)as A++ XO3 · x(H2O)

(34.2.1)Dana Group

34.2.1.1 Graemite CuTeO3·(H2O) Pcmm 2/m 2/m 2/m

Strunz Class:

IV/K.05-20 IV - Oxides

IV/K - Sulfides, selenides, tellurides with [XO3]2- groups and related structures

IV/K.05 - Gravegliaite - sophiite series

IV/K.05-05 Gravegliaite Mn(SO3)·3(H2O) P nma 2/m 2/m 2/m

IV/K.05-10 Hannebachite 2CaSO3·(H2O) Pbna 2/m 2/m 2/m

IV/K.05-15 Orschallite Ca3(SO3)2SO4·12(H2O) R 3c 3 2/m

IV/K.05-20 Graemite CuTeO3·(H2O) Pcmm 2/m 2/m 2/m

IV/K.05-30 Choloalite CuPb(TeO3)2 Unk Cubic

IV/K.05-40 Sophiite Zn2(SeO3)Cl2 Pccn 2/m 2/m 2/m

IV/K.05-70 Burnsite! KCdCu7O2(SeO3)2Cl9 P 6₃/mmc 6/m 2/m 2/m

Other Graemite Information

References:

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

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Graemite

CuTeO3·(H2O)
Dana No: 34.2.1.1 Strunz No: IV/K.05-20
Locality:

Notes: