Skip to main content
Earth, Planets and Space

Table 1 Titanian clinohumite from Cerro del Almirez, Spain (Al) and Cima di Gagnone, Switzerland (MG)

From: FTIR and Raman spectroscopy characterization of fluorine-bearing titanian clinohumite in antigorite serpentinite and chlorite harzburgite

 

Sample: rock type

Al96-20: Ant serp

Al96-15B: TiCl vein Serp

Al96-10: Px lamella

Al96-1C: Chl harz

Al01-7B: En vein

Al98-29A: Marble

MG-304B: Chl perid

SiO2

35.8

(9)

36.4

(5)

36.8

(1)

36.2

(2)

36.9

(4)

36.8

(4)

36.2

(4)

TiO2

5.4

(1)

5.3

(2)

5.6

(2)

4.9

(1)

4.8

(1)

2.4

(1.1)

1.9

(6)

FeO

7.1

(2)

8.7

(5)

8.1

(6)

8.3

(1)

8.9

(2)

9.1

(8)

8.4

(3)

MnO

0.36

(4)

0.32

(3)

0.39

(3)

0.13

(2)

0.10

(5)

0.10

(3)

0.08

(4)

MgO

47.8

(1.2)

47.3

(5)

47.6

(4)

47.7

(2)

48.1

(3)

49.4

(1.0)

49.8

(4)

NiO

0.14

(3)

0.16

(1)

0.15

(2)

0.25

(1)

0.19

(1)

0.19

(1)

0.14

(2)

F

0.02

(2)c

0.02

(2)c

0.014

(4)d

0.49

(5)

0.62

(4)

1.58

(50)

1.78

(21)

H2Oa

2.71

(26)

2.73

(2)

2.74

(2)

2.50

(2)

2.47

(3)

2.02

(23)

1.91

(10)

Total

99.6

(8)

101.0

(5)

101.5

(3)

100.8

(4)

102.1

(6)

101.6

(3)

100.4

(5)

n

4

16

5

5

4

8

5

Ti

0.45

(19)

0.43

(2)

0.46

(1)

0.41

(1)

0.39

(1)

0.20

(9)

0.16

(5)

Fe

0.66

(7)

0.80

(4)

0.74

(6)

0.76

(1)

0.81

(1)

0.82

(7)

0.76

(3)

Mn

0.03

(2)

0.03

(0)

0.04

(0)

0.01

(0)

0.01

(0)

0.01

(0)

0.01

(0)

Mg

7.87

(64)

7.73

(6)

7.74

(5)

7.80

(1)

7.77

(1)

7.97

(12)

8.10

(5)

Ni

0.01

(2)

0.01

(0)

0.01

(0)

0.02

(0)

0.02

(0)

0.02

(0)

0.01

(0)

F

0.005

(10)

0.006

(10)

0.009

(10)

0.17

(2)

0.21

(1)

0.54

(17)

0.61

(7)

OHb

1.10

(32)

1.12

(3)

1.07

(3)

1.02

(3)

1.01

(2)

1.07

(5)

1.08

(3)

  1. TiCl compositions are an average of several electron probe analyses on a rock sample shown as weight percent, and the number of points used for the average is indicated as ‘n.’ Large standard deviations of the average represent the extent of sample heterogeneity, as indicated by italics. Numbers in parentheses indicate the uncertainty expressed as the last digits of reported values, as in ‘1.07 (5)’ corresponds to 1.07 ± 0.05. aH2O weight percent was calculated from the stoichiometric balance of OH. bOH was calculated from the stoichiometric balance. cThree low F abundance measurements were below the detection limit and the relative standard deviations were more than 100%; hence, these values should be considered as maximum possible values. dThe value verified by a secondary ion mass spectrometer.
Back to article page