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Pianlinite

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Formula:
Al
 
2
Si
 
2
O
 
6
(OH)
 
2
System:OrthorhombicLustre:Vitreous
Hardness:6 - 7


Originally reported from Pianling, Xiuyan Co., Anshan Prefecture, Liaoning Province (Manchuria), China.

Classification of Pianlinite

IMA status:Discredited 1987
Explanation of status:Probably a disordered kaolinite; discredited by CNMMN (1987).
Strunz 8th edition ID:8/H.26-20

8 : Silicates
H : Phyllosilicates (layered), Tetragonal or pseudotetragonal layered structures [Si4O10]4- and others
26 : Allophane - Sturtite series
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Physical Properties of Pianlinite

Lustre:Vitreous
Hardness (Mohs):6 - 7

Crystallography of Pianlinite

Crystal System:Orthorhombic

Optical Data of Pianlinite

Type:Biaxial (-)
RI values: nα = 1.532 nβ = 1.539 nγ = 1.541
2V:Calculated: 56°
Maximum Birefringence:δ = 0.009

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak

Chemical Properties of Pianlinite

Formula:
Al
 
2
Si
 
2
O
 
6
(OH)
 
2
Essential elements:Al, H, O, Si
All elements listed in formula:Al, H, O, Si

Relationship of Pianlinite to other Species

Related Minerals - Strunz Grouping):

- +
8/H.26-10Allophane
(Al
 
2
O
 
3
)(SiO
 
2
)
 
1.3-2
 · 2.5-3H
 
2
O
8/H.26-30Imogolite
Al
 
2
SiO
 
3
(OH)
 
4
8/H.26-40Odinite
(Fe,Mg,Al,Fe,Ti,Mn)
 
2.4
((Si,Al)
 
2
O
 
5
)(OH)
 
4
8/H.26-50Hisingerite
Fe
3+
2
(Si
 
2
O
 
5
)(OH)
 
4
 · 2H
 
2
O
8/H.26-60Neotocite
(Mn,Fe,Mg)SiO
 
3
 · H
 
2
O

Other Names for Pianlinite

Other Languages:
German:Pianlinit
Spanish:Pianlinita

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 Pianlinite

Reference List:

- +
Discreditation: Amer.Mineral. (1987) 72, 1031.

Internet Links for Pianlinite

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    • Localities for Pianlinite

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    (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.
    China
     
    • Liaoning Province (Manchuria; Dongbei Region)
      • Anshan Prefecture
        • Xiuyan Co.
    		AM 65 (1980), 1068
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