Holtite R061049



Name: Holtite
RRUFF ID: R061049
Ideal Chemistry: (Ta0.6   0.4)Al6BSi3O18
Locality: Kola Peninsula, U.S.S.R.
Source: Michael Scott S100998 [view label]
Owner: RRUFF
Description: Blocky crystals; as pseudohexagonal elongated needles, light buff to cream-buff or deep olive-buff in color. Crystals are twinned by a 2-fold rotation around [010].
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Dumortierite (5) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R061049
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R061049.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 4.6918(8)Å    b: 11.880(3)Å    c: 20.372(5)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 1135.5(2)Å3    Crystal System: orthorhombic
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Holtite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Pryce M W (1971) Holtite: a new mineral allied to dumortierite, Mineralogical Magazine, 38, 21-25   [view file]

Fleischer M (1972) New mineral names, American Mineralogist, 57, 1552-1561   [view file]

Hoskins B F, Mumme W G, Pryce M W (1989) Holtite, (Si2.25Sb0.75)B[Al6(Al0.43Ta0.27   0.30)O15(O,OH)2.25]: crystal structure and crystal chemistry, Mineralogical Magazine, 53, 457-463   [view file]

Jambor J L, Grew E S (1990) New mineral names, American Mineralogist, 75, 931-937   [view file]

Kazantsev S S, Pushcharovsky D Y, Pasero M, Merlino S, Zubkova N V, Kabalov Y K ,Voloshin A V (2005) Crystal structure of holtite I, Crystallography Reports, 50, 42-47

Kazantsev S S, Zubkova N V, Voloshin A V (2006) Refinement of composition and structure of holtite I, Crystallography Reports, 51, 412-413

Locock A J, Piilonen P C, Ercit T S, Rowe R (2006) New mineral names, American Mineralogist, 91, 216-224   [view file]

Zubkova N V, Pushcharovskii P Y, Kabalov Y K, Kazantsev S S, Voloshin A V (2006) Crystal structure of holtite II, Crystallography Reports, 51, 16-22

Groat L A, Grew E S, Evans R J, Pieczka A, Ercit T S (2009) The crystal chemistry of holtite, Mineralogical Magazine, 73, 1033-1050   [view file]

Evans R J, Fyfe C A, Groat L A, Lam A E (2012) MAS NMR measurements and ab initio calculations of the 29Si chemical shifts in dumortierite and holtite, American Mineralogist, 97, 329-340   [view file]

Evans R J, Groat L A (2012) Structure and topology of dumortierite and dumortierite-like materials, The Canadian Mineralogist, 50, 1197-1231   [view file]

Groat L A, Evans R J, Grew E S, Pieczka A (2012) The crystal chemistry of As- and Sb-bearing dumortierite, The Canadian Mineralogist, 50, 855-872   [view file]

Pieczka A, Evans R J, Grew E S, Groat L A, Ma C, Rossman G R (2013) The dumortierite supergroup. I. A new nomenclature for the dumortierite and holtite groups, Mineralogical Magazine, 77, 2825-2839