IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Tengchongite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
CaO · 6UO3 · 2MoO3 · 12H2O
Colour:
Yellow
Lustre:
Vitreous
Hardness:
2 - 2½
Crystal System:
Orthorhombic
Name:
Named after its discovery locality, Tengchong District, Yunnan Province, China.
This page provides mineralogical data about Tengchongite.


Hide all sections | Show all sections

Classification of TengchongiteHide

Approved
Approval Year:
1984
7.HB.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
H : Uranium and uranyl molybdates and wolframates
B : With U6+
49.3.1.2

49 : HYDRATED MOLYBDATES AND TUNGSTATES
3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen
27.3.12

27 : Sulphites, Chromates, Molybdates and Tungstates
3 : Molybdates

Physical Properties of TengchongiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Yellow
Hardness:
2 - 2½ on Mohs scale

Optical Data of TengchongiteHide

Type:
Biaxial (-)
RI values:
nα = 1.663 nβ = 1.760 nγ = 1.762
2V:
Measured: 16° , Calculated: 14°
Max Birefringence:
δ = 0.099
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak

Chemical Properties of TengchongiteHide

Formula:
CaO · 6UO3 · 2MoO3 · 12H2O
IMA Formula:
Ca(UO2)6(MoO4)2O5 · 12H2O

Crystallography of TengchongiteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 15.61 Å, b = 13.04 Å, c = 17.71 Å
Ratio:
a:b:c = 1.197 : 1 : 1.358
Unit Cell V:
3,604.95 ų (Calculated from Unit Cell)

Type Occurrence of TengchongiteHide

Synonyms of TengchongiteHide

Other Language Names for TengchongiteHide

Related Minerals - Nickel-Strunz GroupingHide

7.HB.15Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2O
7.HB.25Uranotungstite(Fe2+,Ba,Pb)(UO2)2(WO4)(OH)4 · 12H2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide

49.3.1.1Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2O

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.3.1LindgreniteCu3(MoO4)2(OH)2Mon. 2/m : P21/m
27.3.2PowelliteCa(MoO4)Tet. 4/m : I41/a
27.3.3WulfenitePb(MoO4)Tet. 4/m : I41/a
27.3.4KoechliniteBi2MoO6Orth. mm2 : Pna21
27.3.5SedoviteU(MoO4)2Orth.
27.3.6MouriteUMo5O12(OH)10Mon.
27.3.7Iriginite(UO2)Mo2O7 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
27.3.8Umohoite(UO2)MoO4 · 2H2OTric.
27.3.9MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2O
27.3.10CousiniteMgU2Mo2O11 · 6H2O
27.3.11Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2O
27.3.13KamiokiteFe2Mo3O8Hex.
27.3.14FerrimolybditeFe2(MoO4)3 · nH2OOrth. mmm (2/m 2/m 2/m) : Pmmn

Other InformationHide

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

References for TengchongiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chen Zhangru, Luo Keding, Tan Falan, Zhang Yi, and Gu Xiaofa (1986): Tengchongite, a new mineral of hydrated calcium uranyl molybdate. Kexue Tongbao [Science Bulletin] 31, 396-401 (in Chinese). - American Mineralogist (1988), 73, 195-196 (abstract).

Internet Links for TengchongiteHide

Localities for TengchongiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China (TL)
 
  • Yunnan Province
    • Baoshan Prefecture
      • Tengchong Co.
Chen Zhangru, Luo Keding, Tan Falan, Zhang Yi, and Gu Xiaofa (1986): Kexue Tongbao [Science Bulletin] 31, 396-401.
    • Dehong Autonomous Prefecture
      • Yingjiang Co.
        • Tongbiguan
Chen, Z., Huang, Y. & Gu, X. (1990): A new uranium mineral - yingjiangite. Kuangwu Xuebao [Acta Mineral. Sinica] 10, 102-105. (in Chinese)[Am. Min. 76, 1731(1991)(abstract)] ; Chen Zhangru, Huang Yuzhu, and Gu Xiaofa (1990): A new uranium mineral - Yingjiangite. Acta Mineralogica Sinica 10(2), 102-105.
Russia
 
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Chitinskaya Oblast'
        • Krasnokamensk
          • Strel'tsovskoe Mo-U ore field
M.E. Ciriotti (2005) Probed
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 23, 2018 00:24:54 Page generated: August 1, 2018 17:38:48
Go to top of page