Rhodizite Mineral Data + 
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- 25.8.2.1 Rhodizite (K,Cs)Al4Be4(B,Be)12O28 P 43m 4 3m
- 25.8.2.2 Londonite! CsAl4Be4(B,Be)12O28 P 43m 4 3m
- V/L.02-10 Hambergite Be2BO3(OH) P bca 2/m 2/m 2/m
- V/L.02-20 Rhodizite (K,Cs)Al4Be4(B,Be)12O28 P 43m 4 3m
- V/L.02-30 Londonite! CsAl4Be4(B,Be)12O28 P 43m 4 3m
General Rhodizite Information |
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 Chemical Formula: |
(K,Cs)Al4Be4(B,Be)12O28 | ||
| Composition: |
Molecular Weight = 778.83 gm | ||
| Cesium 4.27 % Cs 4.52 % Cs2O | |||
| Potassium 3.77 % K 4.54 % K2O | |||
| Beryllium 8.10 % Be 22.48 % BeO | |||
| Aluminum 13.86 % Al 26.18 % Al2O3 | |||
| Boron 12.49 % B 40.22 % B2O3 | |||
| Oxygen 57.52 % O | |||
| ______ ______ | |||
| 100.00 % 97.95 % = TOTAL OXIDE | |||
| Empirical Formula: |
K0.75Cs0.25Al4Be412(B0.75)12(Be0.25)O28 | ||
| IMA Status: |
Valid Species (Pre-IMA) 1834 | ||
| Locality: |
Sarapulsk and Schaitansk, near Mursinsk, Ural Mountains, Russia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named from the Greek "rose-colored" because it tinges the blowpipe flame red. | ||
| Synonym: |
ICSD 17018 | ||
| PDF 18-327 | |||
Rhodizite Image | |||
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Rhodizite Crystallography |
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| Cell Dimensions: |
a = 7.317, Z = 1; V = 391.74 Den(Calc)= 3.30 | ||
| Crystal System: |
Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: P 43m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.983(1), 2.44(0.5), 3.27(0.5), | ||
Physical Properties of Rhodizite |
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| Cleavage: |
[111] Indistinct, [111] Indistinct, [111] Indistinct | ||
| Color: |
Colorless, Grayish, Yellow, Yellowish white, White. | ||
| Density: |
3.44 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
| Habit: |
Crystalline - Coarse - Occurs as well-formed coarse sized crystals. | ||
| Hardness: |
8.5 - Chrysoberyl | ||
| Luminescence: |
Piezoelectric and pyroelectric. | ||
| Luster: |
Vitreous - Adamantine | ||
| Streak: |
white | ||
Optical Properties of Rhodizite |
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| Gladstone-Dale: |
CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2102,KPDmeas= 0.2016,KC= 0.2089 |
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| Optical Data: |
Isotropic, n=1.6935. | ||
Calculated Properties of Rhodizite |
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| Electron Density: |
relectron=3.19 gm/cc |
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| Fermion Index |
Fermion Index = 0.10613 Boson Index = 0.89387 |
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| Photoelectric: |
PERhodizite = 17.81 barns/electron |
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| Radioactivity: |
GRapi = 52.60 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Rhodizite |
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Rhodizite Classification |
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| Dana Class: |
25.8.2.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen | ||
| (25.8)Dana Type | |||
| (25.8.2)Dana Group | |||
| Strunz Class: |
V/L.02-20 V - Nitrates, Carbonates and Borates | ||
| V/L - Shelly borates with [BO2]1- to [B6O10]2- | |||
| V/L.02 - Hambergite - Rhodizite series | |||
Other Rhodizite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Rhodizite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 - Minerals of Wisconsin 13 -QUT Mineral Atlas 14 - Tradeshop.com - The Rainbow of Gems 15 - WWW-MINCRYST 16 -École des Mines de Paris Search for Rhodizite using: Visit our Advertisers for Rhodizite : Translate Rhodizite Mineral Data : Ask about Rhodizite here : Print or Cut-and-Paste your Rhodizite Specimen Label here :
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