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About PreobrazhenskiteHide

Pavel I. Preobrazhenskii
Colourless, lemon-yellow, dark gray
4½ - 5
Specific Gravity:
2.45 (Calculated)
Crystal System:
Named in honor of Pavel Ivanovich Preobrazhenskii (Павел Иванович Преображенский) (13 January 1874, Demyansk, Novgorod Province, Russian Empire - 10 September 1944, Moscow, USSR), geologist with the Institute of Halurgy, St. Petersburg, and the Institute of Mining and Chemical Stock, Moscow, Russia and professor in the Department of Geology and Mineralogy, Perm University. He was an expert in Russian salt deposits and was a discoverer of the Inder deposit, Kazakhstan.
This page provides mineralogical data about Preobrazhenskite.

Classification of PreobrazhenskiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:

G : Heptaborates and other megaborates
B : Phyllo-nonborates, etc.

7 : Nonaborates

9 : Borates
2 : Borates of Be and Mg

Physical Properties of PreobrazhenskiteHide

Colourless, lemon-yellow, dark gray
4½ - 5 on Mohs scale
2.45 g/cm3 (Calculated)

Optical Data of PreobrazhenskiteHide

Biaxial (+)
RI values:
nα = 1.573 - 1.576 nβ = 1.573 - 1.576 nγ = 1.594 - 1.596
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
relatively strong

Chemical Properties of PreobrazhenskiteHide


Crystallography of PreobrazhenskiteHide

Crystal System:
Cell Parameters:
a = 16.33 Å, b = 9.16 Å, c = 10.59 Å
a:b:c = 1.783 : 1 : 1.156
Unit Cell V:
1,584.08 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
5.28 (100)
3.79 (100)
3.230 (90)
3.187 (90)
2.821 (90)
2.769 (90)
2.641 (90)

Occurrences of PreobrazhenskiteHide

Paragenetic Mode(s):
•  Evaporite

Type Occurrence of PreobrazhenskiteHide

General Appearance of Type Material:
Nodules in fine-grained halite-polyhalite rock and encloses kaliborite and boracite. In places it has been partially replaced by inyoite.
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, 1497/1–2,5.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 57015.
Yarzhemskii, Ya. Ya. (1956) Preobrazhenskite, a new borate of the saliferous strata of the Inder uplift. Doklady Akademii Nauk SSSR: 111: 1087-1090.

Other Language Names for PreobrazhenskiteHide

Related Minerals - Nickel-Strunz GroupingHide

6.GB.05StudenitsiteNaCa2[B9O14(OH)4] · 2H2OMon.
6.GB.10PenobsquisiteCa2Fe2+[Cl|B9O13(OH)6]Cl · 4H2OMon.
6.GB.20WalkeriteCa16(Mg,Li,◻)2[B13O17(OH)12]4Cl6·28H2OOrth. mm2 : Pba2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.2.1HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.2.3KotoiteMg3[BO3]2Orth. mmm (2/m 2/m 2/m) : Pnnm
9.2.6AksaiteMg[B6O7(OH)6] · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
9.2.7WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
9.2.8PinnoiteMg[B2O(OH)6]Tet. 4/m : P42/m
9.2.9KurnakoviteMgB3O3(OH)5 · 5H2OTric. 1 : P1
9.2.10HalurgiteMg2[B4O7]2 · 5H2OMon.
9.2.11InderiteMgB3O3(OH)5 · 5H2OMon. 2/m : P21/b
9.2.12HungchaoiteMg(B4O7) · 9H2OTric. 1
9.2.13AdmontiteMgB6O10 · 7H2OMon.
9.2.14McallisteriteMg2[B6O7(OH)6]2 · 9H2OTrig. 3m (3 2/m) : R3c
9.2.15RivadaviteNa6Mg[B6O7(OH)6]4 · 10H2OMon. 2/m : P21/m
9.2.16KaliboriteKMg2H[B6O8(OH)5]2(H2O)4Mon. 2/m : B2/b
9.2.17IquiqueiteK3Na4Mg(CrO4)B24O39(OH) · 12H2OHex.

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 PreobrazhenskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yarzhemskii, Ya. Ya. (1956) Preobrazhenskite, a new borate of the saliferous strata of the Inder uplift. Doklady Akademii Nauk SSSR: 111: 1087-1090.
Fleischer, M. (1957) New mineral names. American Mineralogist: 42: 704.
Ostrovskaya, I.V., Nikitna, I.B. (1969) The formula of preobrazhenskite. Tr. Mineral. Muz. Akad. Nauk SSSR: 19: 206-209.
Fleischer, M. (1970) New mineral names. American Mineralogist: 55: 1067-1073.
Burns, P.C., Hawthorne, F.C. (1994) Structure and hydrogen bonding in preobrazenskite, a complex heteropolyhedral borate. Canadian Mineralogist: 32: 387-396.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Strunz, H. (1997) Classification of borate minerals. European Journal of Mineralogy: 9: 231-235.

Internet Links for PreobrazhenskiteHide

Localities for PreobrazhenskiteHide

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.
  • Aktobe
    • Shalkar
      • Aksai Valley
Handbook of Mineralogy Vol V p 6
  • Atyrau
    • Inder
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30; Pekov, I. V. & Abramov, D. V. (1993): Boron deposit of the Inder and its minerals. World of Stones, 1, 23-30.
Mineral and/or Locality  
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