Title 海洋生物の生成する炭酸カルシウムのX線回折測定

Author(s) 政木, 清孝; 磯村尚子; 山本広美

Citation 沖縄工業高等専門学校紀要 = Bulletin of Okinawa NationalCollege of Technology(9): 1-12

Issue Date 2015-03

URL http://hdl.handle.net/20.500.12001/18711

Rights 沖縄工業高等専門学校

X

(1)

(2)

(3)

X

Aragonite

470

Calcite

200

19 p.1-12 2015

ISSN 1881-722X

X-Ray diffraction method

XRD

1 400mm Acropora

intermedia

1 2 a 5

MC110 2 b

2~3mm

3 Mizuhopecten yessoensis

(a) Sampling position (b)Shape of sample

Fig.1 The skeleton of Acropora intermedia Fig.2 Detail of XRD measurement sample

2~3mm

15mm

2 Bulletin of Okinawa National College of Technology, No.9 (2015)

5

4 a

15mm No.1 10mm 5mm×5mm

A-2 A-3

C-2 C-3

X 5 X XRD-6100 Cu

50kV 35mA X Ni

2mm 2 0.02 deg 1.0

deg/min 10 80 deg 6

X

PatView K 2

American Mineralogist Crystal Structure Database AMCSD

(a) Left shell (b) Right shell

Fig.3 The Shells of Mizuhopecten yessoensis

(a) Left shell (b) Right shell

Fig.4 Sampling position and shape of sample

Inside Inside Outside Outside

The site for attachment of adductor muscle

3沖縄高専紀要　第 9号（2015）

Fig.5 XRD measurement equipment. Fig.6 Example of sample setting

X 7 AMCSD

100%

7

Position 1 Position 2

42.94 deg

45.90 deg

X

48 deg

48.35 deg

48.51 deg Position 1 Position 2

Position 3 Position 2

42.06 deg 62.70 deg 75.16 deg [A]

Position 2

Position 5

3

Position 4 [B]

[A]

42.94 deg 63.39 deg 76.85 deg

[A]

Coral

Shell

4 Bulletin of Okinawa National College of Technology, No.9 (2015)

Fig.7 XRD profiles of Acropora intermedia as shown in Fig.2(a).

0.5

1.0

1.5

2.0[ 104]In

tens

ity /

cps position 1

20 30 40 50 60 70 80

0.5

1.0

1.5

2.0[ 104]

2 / deg

Inte

nsity

/ cp

s position 5

[ A ][ A ] [ A ]

[ A ]

[ A ]

[ A ]

[ B ]

[ B ]

[ B ]

(1 1 1)

(2 2 0)

(2 2 1)

(0 4 1) (2 0 2)

(1 5 1)

(2 2 0)

(2 0 4) (4 0 0)

0.5

1.0

1.5

2.0[ 104]

Inte

nsity

/ cp

s position 2

0.5

1.0

1.5

2.0[ 104]

Inte

nsity

/ cp

s position 3

20 30 40 50 60 70 80

0.5

1.0

1.5

2.0[ 104]

Inte

nsity

/ cp

s position 4

5沖縄高専紀要　第 9号（2015）

X 8

0~10000cps AMCSD

A-2 A-3

A-1 29.42 deg

47.54 deg

77 deg

72.95 deg

58deg

AMCSD

A-2 A-3

31.17 deg

58deg A-4

A-5 37 deg 77 deg

B

58 deg

47 deg

A B 77 deg

A-1 B-1 Unknown peak

X 9 C-2 C-3

A-2 A-3

31.17 deg

D B

47 deg

C D

77 deg C-1 D-1

42 deg C-1 D-1 Unknown peak

6 Bulletin of Okinawa National College of Technology, No.9 (2015)

Fig.8 XRD profiles of Mizuhopecten yessoensis (Left shell)

20 30 40 50 60 70 800

5000

10000

Inte

nsity

/ cp

s B-220 30 40 50 60 70 800

5000

10000

Inte

nsity

/ cp

s B-320 30 40 0 60 0 800

5000

10000

Inte

nsity

/ cp

s B-420 30 40 50 60 70 800

5000

10000

Inte

nsity

/ cp

s B-5

20 30 40 50 60 70 800

0

0A-2

0

0

0A-3

0

0

0A-4

20 30 40 50 60 70 800

0

0A-5

20 30 40 50 60 70 800

5000

10000

2� / deg

Inte

nsity

/ cp

s A-1

20 30 40 50 60 70 800

5000

10000

2� / deg

Inte

nsity

/ cp

s B-1

Aragonite

Calcite

Aragonite

Calcite

C(104) C(018)

A(002)

C C C A

A

A A C C C A

A

C A

C C

C(018) C(116)

C(116)

Unknown peak Unknown peak

A

7沖縄高専紀要　第 9号（2015）

Fig.9 XRD profiles of Mizuhopecten yessoensis (Right shell)

0

0

0D-2

0

0

0D-3

0

0D-4

20 30 40 0 60 0 800

0

0D-5

20 30 40 50 60 70 800

5000

10000

2� / deg

Inte

nsity

/ cp

s D-1

0

5000

10000

Inte

nsity

/ cp

s C-5

20 30 40 0 60 0 800

5000

10000

Inte

nsity

/ cp

s C-4

20 30 40 0 60 0 800

5000

10000

Inte

nsity

/ cp

s C-3

0

5000

10000

Inte

nsity

/ cp

s C-2

20 30 40 50 60 70 800

5000

10000

2� / deg

Inte

nsity

/ cp

s C-1

Aragonite

Calcite

Aragonite

Calcite

C(104) C(018)

A(002)

A

A

C

C(018) C(116) C(116) Unknown peak

Unknown peak C(104)

Unknown peak Unknown peak

8 Bulletin of Okinawa National College of Technology, No.9 (2015)

X

7 [A]

[B]

Unknown peak

A-1 B-1 C-1 D-1

nsind2 orsinnd2 (1)

d X n

d

CaCO3

Ca

Ca

Mg Ca Mg mol Mg

29.42 deg 7

30 deg

Mg

Mg 12 Ca 20

Ca Mg

Sr Sr Ca

Ca

Sr

9沖縄高専紀要　第 9号（2015）

AMCSD Sr

42.97 deg

42.94 deg AMCSD Strontianite (SrCO3)

41.55 deg

Position 5 XRD

42 deg 77 deg

Sr

Strontianite (SrCO3)

Position 4

Strontianite (SrCO3) Ca Sr Aragonite

X Energy

dispersive X-ray spectrometry EDX

Acropora intermedia X

Mizuhopecten yessoensis X

1

2

3

21 5

177 188 2012

10 Bulletin of Okinawa National College of Technology, No.9 (2015)

(Scleractinia) : 1. 66

8C 14 1963

JGL 4 4 6 7 2008

M&M'14 CD-ROM No.GS23, 1 4 2014 .

114 117 2013

21 5 159 175 2012

http://mukiken.eng.niigata-u.ac.jp/chemsoft/x-raysoft/PatViewHelp.html

http://rruff.geo.arizona.edu/AMS/amcsd.php

http://rruff.geo.arizona.edu/AMS/amcsd.php (Dal Negro A, Ungaretti L, American Mineralogist 56,768-772

(1971))

http://rruff.geo.arizona.edu/AMS/amcsd.php (Graf D L, American Mineralogist 46, 1283-1316 (1961))

W.D. [1] 62 67 2002

53 3

162 165 (1999)

Higuchi T Fujimura H Yuyama I Harii S Agostini S et al. Biotic Control of Skeletal Growth by

Scleractinian Corals in Aragonite Calcite Seas PLoSONE 9(3) e91021. doi:10.1371 2014

Anja Reitz Gert J. de Lange Abundant Sr-rich aragonite in eastern Mediterranean sapropel S1: Diagenetic

vs. detrital/biogenic origin Palaeogeography, Palaeoclimatology, Palaeoecology 235 135 148 2006

N. Allison A.A. Finch S.R. Sutton M. Newville Strontium heterogeneity and speciation in coral

aragonite: implications for the strontium paleothermometer Geochimica et Cosmochimica Acta 65 16 2669

2676 2001

Michael Holcomb Anne L. Cohen Rinat I. Gabitov Jeffrey L. Hutter Compositional and morphological

features of aragonite precipitated experimentally from seawater and biogenically by corals Geochimica et

Cosmochimica Acta 73 14-15 4166 4179 2009

http://rruff.geo.arizona.edu/AMS/amcsd.php (Ye Y, Smyth J R, Boni P, American Mineralogist 97, 707-712

(2012))

http://rruff.geo.arizona.edu/AMS/amcsd.php (de Villiers J P R, American Mineralogist 56, 758-767 (1971))

11沖縄高専紀要　第 9号（2015）

X-Ray diffraction measurement of marine-derived calcium carbonate

Kiyotaka Masaki , Naoko Isomura , Hiromi Yamamoto

Department of Mechanical Systems Engineering, Department of Bioresources Engineering

Okinawa Churashima Foundation

X-ray diffraction measurements (XRD) were obtained for the skeleton of an Acropora intermedia specimen and the shell of a Mizuhopecten yessoensis specimen in order to investigate the crystal structure of marine-derived calcium carbonate. The results implied the following conclusions. (1)The skeleton of Acropora intermedia is composed of aragonite, which is a metastable crystal. It is also oriented along a specific direction located at or near the tip. (2) The shell of Mizuhopecten yessoensis is composed of both calcite, which is stable crystal, and aragonite crystal. The region containing the scallop adductor is primarily composed of a structure formed of aragonite crystal. (3) The diffraction angles of certain aragonite crystal planes were shifted toward lower angles near the tip of the skeleton or the hinge of the shell. This result suggests the influence of strontium present in the specimens.

Key word: Calcium carbonate, X-Ray diffraction method, Aragonite, Calcite, Acropora intermedia,

Mizuhopecten yessoensis

12 Bulletin of Okinawa National College of Technology, No.9 (2015)