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Kozoite-(La)

Formula:
(La,Nd)(CO
 
3
)(OH)
System:OrthorhombicColour:pink, yellow, white
Name:In allusion to its composition with dominant lanthanum, and its relationship to Kozoite-(Nd).


Ancylite Group. The lanthanum analogue of Kozoite-(Nd).

Classification of Kozoite-(La)

IMA status:Approved 2002
Strunz 8th edition ID:5/0.0-
Nickel-Strunz 10th (pending) edition ID:5.DC.05

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
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Type Occurrence of Kozoite-(La)

Type Locality:Mitsukoshi, Hizen-cho, Higashi-Matsuura-gun, Saga Prefecture, Kyushu Island, Japan
General Appearance of Type Material:zoned spherules to 0.5mm
Geological Setting of type material:alkali olivine basalt
Associated Minerals at type locality:
Lanthanite-(Nd)Kozoite-(Nd)

Physical Properties of Kozoite-(La)

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:pink, yellow, white
Streak:white
Density (calculated):4.16 g/cm3

Crystallography of Kozoite-(La)

Crystal System:Orthorhombic
Cell Parameters:a = 4.986Å, b = 8.513Å, c = 7.227Å
Ratio:a:b:c = 0.586 : 1 : 0.849
Unit Cell Volume:V 306.7 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
5.54 (32)
4.31 (100)
3.69 (72)
2.93 (57)
2.33 (50)
2.06 (48)

Chemical Properties of Kozoite-(La)

Formula:
(La,Nd)(CO
 
3
)(OH)
Idealised Formula:
La(CO
 
3
)(OH)
All elements listed in formula:C, H, La, Nd, O
Analyical Data:(CO2 and H2O calculated)
CaO (6.30)
SrO (1.36)
La2O3 (35.55)
Ce2O3 (0.00)
Pr2O3 (4.68)
Nd2O3 (17.60)
Sm2O3 (1.15)
Eu2O3 (0.00)
Gd2O3 (1.49)
Tb2O3 (0.00)
Dy2O3 (0.09)
Er2O3 (0.04)
Y2O3 (3.88)
CO2 (23.17)
H2O (5.87)
Empirical Formula:
(La
 
0
·41Ca
 
0
·21Nd
 
0
·20Y
 
0
·07Pr
 
0
·05Sr
 
0
·02Gd
 
0
·02Sm
 
0
·01)
 
0
·99(CO
 
3
)
 
1
·00[(OH)
 
0
·74(H
 
2
O)
 
0
·25]
 
0
·99
Common Impurities:Nd

Relationship of Kozoite-(La) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.DC.05Ancylite-(Ce)
SrCe[OH|(CO
 
3
)
 
2
] · H
 
2
O
5.DC.05Calcioancylite-(Ce)
(Ca,Sr)Ce(CO
 
3
)
 
2
OH·H
 
2
O
5.DC.05Calcioancylite-(Nd)
(Nd,Ce)
 
3
Ca(CO
 
3
)
 
4
(OH)
 
3
·H
 
2
O
5.DC.05Gysinite-(Nd)
Pb(Nd,La)[OH|(CO
 
3
)
 
2
] · H
 
2
O
5.DC.05Ancylite-(La)
Sr(La,Ce)[OH|(CO
 
3
)
 
2
] · H
 
2
O
5.DC.05Kozoite-(Nd)
(Nd,La,Sm,Pr)[OH|CO
 
3
]
5.DC.10Kamphaugite-(Y)
Ca(Y,REE)[OH|(CO
 
3
)
 
2
] · H
 
2
O
5.DC.15Sheldrickite
NaCa
 
3
(CO
 
3
)
 
2
F
 
3
·H
 
2
O
5.DC.20Thomasclarkite-(Y)
(Na,Ce)(Y,REE)[(OH)
 
3
|HCO
 
3
] · 4H
 
2
O
5.DC.25Peterbaylissite
(Hg-Hg)
 
1.5
[OH|CO
 
3
] · 2H
 
2
O
5.DC.30Clearcreekite
(Hg-Hg)
 
1.5
[OH|CO
 
3
] · 2H
 
2
O

Other Names for Kozoite-(La)

Synonyms:
IMA2002-054
Other Languages:
Japanese:弘三石-(La)
Russian:Козоит-(La)

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Kozoite-(La)

Reference List:Miyawaki, R., Matsubara, S., Yokoyama, K., Iwano, S., Hamasaki, K., Yukinorii, I. (2003): Kozoite-(La), La(CO3)(OH), a new mineral from Mitsukoshi, Hizen-cho, Saga Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 98, #4, 137-141 (August 2003).

Articles/Blogs about Kozoite-(La)

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    Localities for Kozoite-(La)

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Kyushu Island
      • Saga Prefecture
        • Higashi-Matsuura-gun
          • Hizen-cho
    		American Mineralogist, (2000) 85, 1076–1081
    Mineral and/or Locality
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