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Krásnoite

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Big Photo

Huber stock (Huber shaft; Hub stock), Krásno (Schönfeld), Horní Slavkov (Schlaggenwald), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
© Leon Hupperichs

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Formula:
Ca
 
3
Al
 
7.7
Si
 
3
P
 
4
O
 
23.5
(OH)
 
12.1
F
 
2
 · 8H
 
2
O
System:Trigonal
Member of:Perhamite Group
Name:
Named for the district where the species was first discovered ‒ the Krásno ore district.


The fluorophosphate analogue of perhamite. Visually similar to perhamite, crandallite, plumbogummite and iangreyite.

Classification of Krásnoite

IMA status:Approved 2011
Nickel-Strunz 10th (pending) edition ID:8.DO.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
Dana 8th edition ID:43.5.10.2

43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
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Type Occurrence of Krásnoite

Co-type Localities:Huber stock (Huber shaft; Hub stock), Krásno (Schönfeld), Horní Slavkov (Schlaggenwald), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
Silver Coin Mine, Valmy, Iron Point District, Humboldt Co., Nevada, USA
Place of Conservation of Type Material:National Museum Prague, catalogue number P1P 2/2011 (Krásno); Natural History Museum of Los Angeles County catalogue number 62372 and 62373 (Silver Coin).

Crystallography of Krásnoite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:P3m1 {P3 2/m 1}
Cell Parameters:a = 6.9956(4) Å, c = 20.200(2) Å
Ratio:a:c = 1 : 2.888
Unit Cell Volume:V 856.09 ų
Z:3
X-Ray Powder Diffraction:
d-spacingIntensity
20.186(97)
6.736(100)
5.800(67)
3.496(60)
2.873(87)
2.763(73)
2.104(75)
1.748(64)

Chemical Properties of Krásnoite

Formula:
Ca
 
3
Al
 
7.7
Si
 
3
P
 
4
O
 
23.5
(OH)
 
12.1
F
 
2
 · 8H
 
2
O
Essential elements:Al, Ca, F, H, O, P, Si
All elements listed in formula:Al, Ca, F, H, O, P, Si

Relationship of Krásnoite to other Species

Member of:Perhamite Group
Other Members of Group:

- +
Perhamite
Ca
 
3
Al
 
7.7
Si
 
3
P
 
4
O
 
23.5
(OH)
 
14.1
 · 8H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.DO.05Girvasite
NaCa
 
2
Mg
 
3
(PO
 
4
)
 
2
(H
 
2
PO
 
4
)(CO
 
3
)(OH)
 
2
 · 4H
 
2
O
8.DO.10Voggite
Na
 
2
Zr(PO
 
4
)(CO
 
3
)(OH) · 2H
 
2
O
8.DO.15Peisleyite
Na
 
2
Al
 
9
[(P,S)O
 
4
]
 
8
(OH)
 
6
•28H
 
2
O
8.DO.20Perhamite
Ca
 
3
Al
 
7.7
Si
 
3
P
 
4
O
 
23.5
(OH)
 
14.1
 · 8H
 
2
O
8.DO.25Saryarkite-(Y)
Ca(Y,Th)Al
 
5
(SiO
 
4
)
 
2
(PO
 
4
,SO
 
4
)
 
2
(OH)
 
7
 · 6H
 
2
O
8.DO.30Micheelsenite
(Ca,Y)
 
3
Al(HPO
 
4
,CO
 
3
)(CO
 
3
)(OH)
 
6
 · 12H
 
2
O
8.DO.40Parwanite
(Na,K)(Mg,Ca)
 
4
Al
 
8
(PO
 
4
)
 
8
(CO
 
3
)(OH)
 
7
 · 30H
 
2
O
8.DO.45Skorpionite
Ca
 
3
Zn
 
2
(PO
 
4
)
 
2
(CO
 
3
)(OH)
 
2
 · H
 
2
O

Other Names for Krásnoite

Synonyms:
IMA2011-040
Other Languages:

Other Information

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 Krásnoite

Reference List:

- +
Mills, S.J., Sejkora, J., Kampf, A.R., Grey, I.E., Bastow, T.J., Ball, N.A., Adams, P.M., Raudsepp, M. and Cooper, M.A. (2011) Krásnoite, IMA 2011-040. CNMNC Newsletter No. 10, October 2011, page 2557; Mineralogical Magazine, 75, 2549-2561.

Mills, S.J., Sejkora, J., Kampf, A.R., Grey, I.E., Bastow, T.J., Ball, N.A., Adams, P.M., Raudsepp, M. and Cooper, M.A. (2012) Krásnoite, the fluorophosphate analogue of perhamite, from the Huber open pit, Czech Republic and the Silver Coin mine, Nevada, USA. Mineralogical Magazine, 76, 625 - 634.

Internet Links for Krásnoite

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    • Localities for Krásnoite

    The 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.
    Hide Locality List
    (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.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Horní Slavkov (Schlaggenwald)
          • Krásno (Schönfeld)
    		Mills, S.J., Sejkora, J., Kampf, A.R., Grey, I.E., Bastow, T.J., Ball, N.A., Adams, P.M., Raudsepp, M. and Cooper, M.A. (2011) Krásnoite, IMA 2011-040. CNMNC Newsletter No. 10, October 2011, page 2557; Mineralogical Magazine, 75, 2549-2561.
    USA
     
    • Nevada
      • Humboldt Co.
        • Iron Point District
          • Valmy
    		Mills, S.J., Sejkora, J., Kampf, A.R., Grey, I.E., Bastow, T.J., Ball, N.A., Adams, P.M., Raudsepp, M. and Cooper, M.A. (2011) Krásnoite, IMA 2011-040. CNMNC Newsletter No. 10, October 2011, page 2557; Mineralogical Magazine, 75, 2549-2561.
    • Utah
      • Box Elder Co.
        • Pilot Range
          • Lucin District
            • Lucin
              • Utahlite Hill
    		Mills, S.J., Sejkora, J., Kampf, A.R., Grey, I.E., Bastow, T.J., Ball, N.A., Adams, P.M., Raudsepp, M. and Cooper, M.A. (2012) Krásnoite, the fluorophosphate analogue of perhamite, from the Huber open pit, Czech Republic and the Silver Coin mine, Nevada, USA. Mineralogical Magazine, 76, 625 - 634.
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