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GEOREF RECORD

Baileychlore, the Zn end member of the trioctahedral chlorite series

Audrey C. Rule and Frank Radke
Baileychlore, the Zn end member of the trioctahedral chlorite series
American Mineralogist (February 1988) 73 (1-2): 135-139

Abstract

Baileychlore, a new Zn-rich chlorite, occurs as dark green rims on colloform calcite veins within a strongly oxidized collapse karst-breccia containing altered andesite and garnet-vesuvianite skarn clasts at the Red Dome deposit near Chillagoe, Queensland, Australia. The ZnO contents are fairly uniform from 28.2 to 30.5 wt.% at a depth of 89.6 m in the deposit, and the mineral has a structural formula of 371(Zn (sub 2.50) Fe (super 2+) (sub 1.20) Al (sub 1.17) Mg (sub 0.76) Mn (super 2+) (sub 0.01) box (sub 0.36) )(Si (sub 3.55) Al (sub 0.45) )O (sub 10) (OH) (sub 8) for the most Zn-rich analysis. Baileychlore occurs as fine-grained transverse fibres exhibiting zoned pleochroic colours (green to yellow-green) along their length; alpha 1.582, gamma 1.614; D 3.18(2) g/cm (super 3) , D(calc.) 3.195 g/cm (super 3) . The X-ray powder pattern is that of the Ib (beta 97 degrees ) polytype; strongest lines are 7.14(100), 14.3(90), 1.542(60), 2.660(50), 3.573(40), 2.450(35), 4.600(30); a 5.346(3), b 9.257(4), c 14.401(7) A, beta 97.12(5)o. The symmetry is probably triclinic C1 or C1 because of semi-random stacking. The name is for Professor Sturges W. Bailey of the University of Wisconsin and is to be used for any trioctahedral chlorite in which Zn is the dominant divalent octahedral cation.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 73
Serial Issue: 1-2
Title: Baileychlore, the Zn end member of the trioctahedral chlorite series
Affiliation: Univ. Wis., Dep. Geol. and Geophys., Madison, WI, United States
Pages: 135-139
Published: 198802
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 9
Accession Number: 1988-027964
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
S29°00'00" - S10°00'00", E138°00'00" - E153°00'00"
Secondary Affiliation: Aust. Miner. Dev. Lab., AUS, Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1988
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