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Swiss Journal of Geosciences

Table 7 Yttrocolumbite

From: Bristen granite: a highly differentiated, fluorite-bearing A-type granite from the Aar massif, Central Alps, Switzerland

Nb2O5

35.4

Nb

0.884

Ta2O5

5.8

Ta

0.084

ThO2

1.8

Sum A

0.968

UO2

31.6

Th

0.022

Y2O3

6.5

U

0.375

Nd2O3

0.2

Y

0.184

Sm2O3

0.1

Nd

0.004

Gd2O3

0.8

Sm

0.003

Dy2O3

0.8

Gd

0.014

Er2O3

2.7

Dy

0.014

Yb2O3

2.8

Er

0.044

FeO

5.7

Yb

0.045

CaO

1.2

Fe2

0.253

  

Ca

0.071

Total

95.4

Sum B

1.030

  

Total cations

1.997

  1. La,Ca, Pr in traces, ideal cations = 2; ideal oxygens = 4
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