Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Caichengyunite

Formula:
Fe
2+
3
Al
 
2
(SO
 
4
)
 
6
·30H
 
2
O
System:MonoclinicColour:grayish white
Hardness:1½ - 2
Name:Named for Chinese geology professor Cai Chen Yung (1907-1982)


grayish-white filiform, fibrous aggregates

Classification of Caichengyunite

IMA status:Published without Approval
mindat.org URL:http://www.mindat.org/min-39649.html
Please feel free to link to this page.

Type Occurrence of Caichengyunite

Type Locality:Longshu Pb-Zn deposit, Huidong Co., Liangshan Autonomous Prefecture, Sichuan Province, China
Place of Conservation of Type Material:not given
Associated Minerals at type locality:
PyriteGalenaSphaleriteChalcopyriteLimonite

Physical Properties of Caichengyunite

Lustre:Vitreous, Silky
Diaphaneity (Transparency):Transparent
Colour:grayish white
Streak:white
Hardness (Mohs):1½ - 2
Density (measured):2.20 g/cm3
Density (calculated):2.19 g/cm3

Crystallography of Caichengyunite

Crystal System:Monoclinic
Cell Parameters:a = 7.63Å, b = 24.13Å, c = 22.64Å
β = 111.06°
Ratio:a:b:c = 0.316 : 1 : 0.938
Unit Cell Volume:V 3,889.87 ų (Calculated from Unit Cell)
Z:4
X-Ray Powder Diffraction:
d-spacingIntensity
5.494 (14)
4.886 (100)
3.776 (21)
3.252 (13)

Optical Data of Caichengyunite

Type:Biaxial (+)
RI values: nα = 1.476 nβ = 1.478 nγ = 1.481
Maximum Birefringence:δ = 0.005

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Optical Extinction:inclined extinction 5-10o parallel to the fibers

Chemical Properties of Caichengyunite

Formula:
Fe
2+
3
Al
 
2
(SO
 
4
)
 
6
·30H
 
2
O
Essential elements:Al, Fe, H, O, S
All elements listed in formula:Al, Fe, H, O, S

Other Information

Fluorescence in UV light:none
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 Caichengyunite

Reference List:Ru-bo Zhang, et al. Caichengyunite: a hydrous sulphate mineral. J. Central Soutn Univ Technolo 3394),331-334(2002) [Am. Min.89,894(2004)](abstract)

Internet Links for Caichengyunite

Search Engines:
  • Look for Caichengyunite on Google
  • Look for Caichengyunite images on Google
    • Mineral Dealers:
  • Fabre Minerals - search for Caichengyunite specimens
  • Find Caichengyunite on www.crystalclassics.co.uk
  • Search for - Caichengyunite - on e-Rocks Mineral Sales & Auctions
  • rare and unusual minerals mainly crystallized
  • Lapis Mineral Magazin
  • Top quality minerals from Kristalle of California
  • The Arkenstone - Fine Minerals
  • Buy Minerals and Crystals from Crystalarium.com
  • Fine Minerals from Dan Weinrich Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy Fine Minerals from mineralsweb.com
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Caichengyunite

    (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
     
    • Sichuan Province
      • Liangshan Autonomous Prefecture
        • Huidong Co.
    		Am.Min. 89,894(2004)
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 2nd Nov 2009 11:34:46